I have seen this guy play 1v1 quick match on small earth...I have a very decent win % against every player but never beaten him. I dont even get close and have no idea if he's cheating in some way. Seems to pick every right move even if I go completely rogue and do stuff I would never do. It is very suspect!

Just check clanwar history’s to figure out. Here you see a match were he didn’t win:

https://www.warzone.com/MultiPlayer?GameID=39416069

But yeah he wins a lot of matches.

I think he's not cheating. He just thinks what will/should you do in that position and defences based on that. His winrate is hidden.

His clan is just very good