Definitely do not use 1xbit - they have a really bad reputation on the forums for a reason.
Yeah and avoid all of the sites listed in this thread actually along with 1xbit -
https://bitcointalk.org/index.php?topic=5283832.0I would recommend trying gg.bet as they have the best odds most often but they do not accept crypto yet.
Nowadays there are many sites who offer E-sports. I do not think there is a good one. Since this is just an element of a sportsbook. I think you should just check the reputation for a bookmaker and look for the limits for example. E-sports is popular. Lot of money will be involved. Maybe there are some sites who only focus on E-sports.
GG.bet and loot.bet are such betting sites that only focus on providing odds for e-sports.
Checking the reputation of the site you play is important and the best way is to check their thread here at bitcointalk and if they have some active negative trust, then better to have a closer look and if everyone is against them like 1xbit, everyone hates them, then just avoid playing there.