Possibly. But there were a LOT of players on defense who were unhappy about Tua's rookie season and more unhappy about Fitzmagic being benched. They felt it tied their hands behind their backs as a defense to have a guy who simply didn't move the ball downfield enough or score enough. In public interviews you saw guys like Xavien Howard and Byron Jones stopping short of publicly criticizing the decision, but speaking glowingly of Fitzmagic and hemming and hawing when asked about Tua. It was pretty clear how most of that locker room felt. They hadn't been impressed with the rookie's tools nor by his performances.
Now, this is not all that uncommon really. Players' livelihoods are on the line, and they want the guy who can win NOW ... and rookies tend not to be that guy, particularly when rehabbing a serious injury and being deprived of preseason games etc. When Tannehill arrived the coaching staff raved about him, he was thrown in when our expected starter got injured ... at home in a non-football related injury. But our star LB then was vocal that he wasn't impressed with Tannehill. He was gone not too long after that in a "cost cutting" move. Our LB corps suffered greatly for a long time after that, but the players got the message and the locker room learned to keep their mouths shut and stop criticizing the young QB. Well, most of them ... there was still Brent Grimes on defense and Brandon Marshall on offense, both of whom were jettisoned shortly after their criticisms became public. So yeah, coaches do that.
I have no idea about Van Noy. But, I do know that there were many players who were critical of the rookie, and that this is normal. Sure, when a rookie has a season like Justin Herbert, they tend to get onboard with that quickly, because he produced and showed high-end tools, so there really cannot be any way of looking at it except recognizing that he was an upgrade over the rest of the roster. But when there's a veteran option or a rookie looks like a rookie ... veterans are going to be critical. The only question is how quiet or vocal they are about those opinions.
Ultimately, every team deals with this. The coaching staff can only protect the kid so much. It's up to the young QB to prove himself worthy. Rosen was not able to do that. I think Tua will be able to prove himself this year.