And honestly, even if you do push back, you probably can't succeed. I used to work with a guy that made enormous, 10k line PRs to our Jenkins code, and would give only 3-4 days for people to review it. We tried to push back on it, but he was the golden boy of one of the people in charge of the project. Even the (inevitable) breakage of software builds when he merged his changes didn't cause any consequences for him. Unfortunately, sometimes with office politics there's absolutely nothing you can do.