I wouldn't suggest going straight behind your team's back to your boss to "Tell". That seems like a quick way to get them all to resent you. I'd try a candid discussion first before this.
Maybe you're right. ... but I think "telling" is also the wrong way to look at it. It's not about who's right and who's wrong or who's the best or who should get dinged or whatever will get people's backs up and invoke pride and resentment among equals. There's a reason why there's a boss, they're there to set direction where their role in doing so is clearly defined to everyone.
I think most people will immediately get their back up if a team member was going straight to their boss anytime something the team member disagreed with was pushed to git.
Something like a style guide might help clarify points. There's also no guarantee that what OP feels about the code is correct. They might like one way but wasn't present for discussions or doesn't understand the work completely. If they're running straight to a manager every time it's only going to end poorly.
I suppose every team is different though.