I do know ESEA.
I'm playing there aswell and I'm also playing FaceIt (which isn't that good)
My currently rank is DMG but I'm normally between LE and LEM.
Well I dont really think, that the fact the Servers are on 64 tick does change the Gameplay.
I don't really get why people are angry on 64 tick Servers, because if they aim the right way they also always hit.
They are pretending they hitted even if they didn't and then saying it's because of the Server.