For mainly esports betting and a bit of sports i'd recommend nitrogensports as they offer a good selection of markets on esports including live markets. The only downside is that cashouts aren't available. If KYC isn't a problem for you I think loot.bet is probably your best option since they update their lines so quick. They're similar to nitrogensports but a bit better as they offer more games like rocket league.
I think nitrogen is having some issues as evident from their
profile page. I think lootbet is a good option but like you said they do require KYC which is a problem for most players otherwise they will rather play on bet365 or williamhill.
It's all a subject of perspective really but if you were to take my opinion, I'd say GG bet has allowed me to earn a considerable amount of wins (wins, not money) in their platform, and they have a couple of features that I'd say is beginner friendly that could help set you up for your journey in esports betting, might as well pay them a visit and check the site out, it's neat and cool.
Do they accept cryptocurrencies though? I don't think so because last time I checked the site I could see it, mostly skrill/Neteller were options that time. Also, do they require KYC? if yes then the problem still remains the same.
I play at sportsbet.io and stake and they have fine odds and most of the games are offered pre-live so unless you want to bet live, you can go with either of the two and there isn't much of an issue with ID verification and such, unless you are cheating.