Screen time limits backfiring - need real solutions

Been trying to enforce 1 hour max on school nights for my 11yo but honestly it's become a battle every single evening. He goes on about how all his friends get more time, the negotiating never stops, and last week I caught him sneaking his Nintendo down to his room after bedtime. I don't want to be the "no fun" dad but I also feel like he's becoming addicted. What actually works for other people? Not looking for judgment, just real strategies that your kids haven't figured out a way around yet.