I'm wearing the right signature of what you are looking for and for sure there will be people that will agree that you can find those e-sports games to bet on on nitrogensports.eu
I do even have a friend who's not really into bitcoin but he loves to gamble and he find it interesting to use bitcoin and as we talk, he mentioned nitrogensports to me and I've seen him bet with e-sports there.
I don't have any interest to say that(unlike the guy above) but I can tell you that nirgoensports is most likely the best sportsbook around, and they also have esports gambling.
The UI is really nice and it's easy to bet even from the mobile, odds are OK compared to other fiat sportsbook, usually Nitrogensports odds are better than them.
They have been here for really long, so you can be sure that you won't have any problems with withdrawing your winnings.
Personally I have used them and never had any problem.