Web slinger with 19k base hero rating

Hey guys! I'm confused how can a player with a 19k base hero rating unlock the web-slinger title, is it even possible? If the player is cheating how can I report him? Thanks!
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4* Ronan 3/5
4* Cyclops 2/5
4* Rhino 2/5
4* Loki 2/5
There are some people in the world chat in-game that keep saying he's cheating so I checked his profile and came here to get some answers.
I have heard of services of extremely skilled players doing realm of legends for a price. I think I don't have to state that it's cheating.
Or maybe a skilled player opened a second account to help their alliance. That actually isn't cheating.
So you never know