nitrogensports.eu is one of the best sportsbooks for esports . high fare odds for every match. Also have an ingame chat support for your inquiries.
Yes I also agree with you, Nitrogensports is best place to make both normal sports bets and esport bets. If you want mutual betting just like how we bet with our group of friends in normal life you can try onehash.
Sportsbet.io also offers CS:GO, LOL and DOTA betting but they have hidden KYC policy even when you are just betting with bitcoin.
Nitrogensports.eu is good maybe the best bitcoin sportsbook for esports match but I hate wait my bet to be graded. Esports match takes a long time to get graded, not only nitrogensports but I think other sportsbook also (bet on esports) but still nitrogensports still the best, they have many kind of esport matches and also options to bet like game 1, game 2, over/under.