Said pass rusher Nick Bosa: “A lot of people give him crap for whatever.”

Of course, these “people” include beat writers. And, at the risk of upsetting Kittle and Bosa, Garoppolo’s performance in the 49ers’ 13-10 divisional-playoff win over the Packers merits scrutiny.

Picking on Garoppolo (again!) after such a monumental victory? Please understand: We come not to bury Jimmy, but to point out some potential causes for concern before the 49ers’ matchup with the Rams on Sunday.

The 49ers won thanks to their suffocating defense and big-play special teams. Garoppolo completed 11 of 19 passes for 131 yards, threw an interception and posted the fourth-lowest passer rating (57.1) of his 52-start career.

It’s worth noting three of Garoppolo’s incompletions were drops, including a perfectly placed potential 63-yard touchdown to Kittle that traveled 30 yards in the air. And it’s fair to point out that he was playing in the NFL equivalent of Antarctica, which won’t be replicated Sunday indoors at SoFi Stadium.

However, Garoppolo still will be playing with a rugged combination for a QB — broken thumb/sprained shoulder — and perhaps it’s not a coincidence that nearly every throw he attempted toward the sideline Saturday was a disaster or an adventure.

Throwing “outside the numbers” has not been Garoppolo’s strength, but it’s possible his current injuries might have made it a liability that could end the 49ers’ season.

Garoppolo completed 3 of 5 outside-the-numbers throws against Green Bay. The tally: a brilliant 15-yard completion to Kittle, a red-zone interception, two near-picks (one was completed) and a dangerous completion to running back Elijah Mitchell that lost a yard.

When asked Monday about Garoppolo’s throws, head coach Kyle Shanahan pointed to the weather — the wind-chill was 0 degrees at kickoff — as the primary factor.

“It was in zero-degree temperatures where most people can’t feel their hands,” Shanahan said. “He almost did complete them there to the flat. But they do travel there. It can make you nervous.”

Indeed. A look at Garoppolo’s five mostly anxiety-producing throws:

• Second quarter: 2nd-and-10 at the 49ers’ 23-yard line: After a straight dropback, Garoppolo targeted Kittle along the left sideline, where he was blanketed in coverage by cornerback Rasul Douglas. Garoppolo led Kittle to the outside, where only Kittle could catch it, and the All-Pro’s extended right hand deflected the ball into his body. Kittle kept his feet in bounds while securing it. Great catch. Wonderful throw. And the exception to the rule.

• Second quarter, 1st-and-goal at Green Bay’s 19: Garoppolo did well to avoid a sack, escaped the pocket to his right, saw Kittle break open in front of him in the shallow corner of the end zone and threw an on-the-run pass without much zip that was easily intercepted by safety Adrian Amos.

• Third quarter, 2nd-and-19 at Green Bay’s 26: Garoppolo floated a 3-yard completion to Mitchell that cornerback Eric Stokes had a chance to intercept if he wasn’t focused on coming up to make the tackle. Said Fox play-by-play man Joe Buck, with his voice rising: “This is nearly picked!”

• Third quarter, 1st-and-10, 49ers’ 28: Garoppolo had Buck yelling again. This time, Garoppolo threw a short pass to the right side to tight end Charlie Woerner that fast-closing linebacker De’Vondre Campbell broke up. Buck: “Garoppolo … throws a dangerous pass … and it’s incomplete for Woerner.”

• Fourth quarter, 1st-and-10, 49ers’ 49: Garoppolo, rolling slightly left, threw an across-his-body floater to the right side that Mitchell grabbed just as he was drilled by cornerback Chandon Sullivan.

It was a 1-yard loss. And it was the final throw by Garoppolo that could cause Shanahan, on the sideline, to say some, well, stuff.

Other observations from the win over the Packers:

• It took that dominating defense two series to awaken, but Fred Warner was ready at the opening jump.

On game’s first series, when the Packers had a no-sweat, 69-yard touchdown drive, the All-Pro inside linebacker was responsible for their only negative play: He stormed into the backfield and stonewalled running back Aaron Jones for a 1-yard loss.

On the second series, when Green Bay was driving again, Warner poked the ball free from tight end Marcedes Lewis to force a fumble the 49ers recovered at their 42.

On Green Bay’s third series, on 3rd-and-6 from the Packers’ 20, Rodgers targeted tight end Dominique Dafney with a deep ball, but Warner had him blanketed 32 yards downfield. Incomplete.

I kind of cringe when hearing the coach cliche about big-time players coming up big in big-time games. But I thought of that when watching Warner.

• Jordan Willis blocked the punt. And Robbie Gould made the field goal. And strong safety Jaquiski Tartt had a largely overlooked game-saving play.

Late in the second quarter, with the Packers leading 7-0, Rodgers completed a 75-yard pass to Jones down the right sideline to the 49ers’ 14.

The reason it wasn’t an 89-yard touchdown that gave Green Bay a 14-0 halftime lead: Tartt. On the play, he was roaming deep near the opposite sideline in zone coverage, and he began sprinting toward the all-alone Jones even before Rodgers released the ball. Tartt then flashed excellent speed to bring down Jones well before the end zone.

It was a display of instincts and effort that proved to be huge when the 49ers blocked a field-goal try to end the second quarter, preserving their 7-0 deficit.

• What happened on that failed 4th-and-1 at Green Bay’s 19 with the 49ers trailing 10-3 with about six minutes left?

My initial thought: Shanahan got too cute with his play call. After review, however, apologies are in order.

On the play, left tackle Trent Williams lined up on the left, as an H-back, and went in motion. It appeared he would serve as an eligible-receiver lead blocker in a short-yardage situation for the second time in the game. (Williams went in motion and led the way on Mitchell’s successful 3rd-and-1 run in the second quarter.)

This time, though, Mitchell ran up the middle and was stuffed for a 1-yard loss.

It initially looked like Shanahan was trying to distract the Packers and use Williams as a decoy. It evoked memories of the wild-card win at Dallas when Shanahan had Williams shift to the right side before the snap on a planned QB sneak that wasn’t attempted because Williams was called for a false-start penalty.

Saturday’s play was designed for Mitchell to get outside behind Williams and left guard Laken Tomlinson, who pulled at the snap. The problem: Right guard Daniel Brunskill and center Alex Mack were knocked backward and Mitchell didn’t have a chance.

The run “usually goes to the outside when everyone plays their gaps right,” Shanahan said.