Okay so I finally sat down to watch this show, I have never played DOTA before (although I did play DOTA2 in beta that's it), and I got to say its pretty good so far, although got to watch season 2 yet. I heard a lot of people say it was bad. and I will admit it did come sandwiched between two big animated shows like Arcane and Invincible so it looks to have got lost in the shuffle and I think overlooked in a way. the show doesn't break any new grounds but its a good slice of action/adventure fantasy.
I am kind of disappointed I got into it kind of late.
I do some some minor nit picks though, sometimes the show can feel a bit too anime for my liking, like I am fine with that, I like anime when its done with Asian animations and usually from Asian studios, but there's a common trend with western animation that tends to try and be Asian influenced anime and it comes off looking very weird, like the show would have your typical western style animation one second and there next there's a guy flying around fighting a dragon looking like something from Dragon Ball Z. This animation works very rarely, Avatar the Last Airbender is probably one of the few who got it right, by taking that influence and giving it a western feel, also with the very Asian atheistic of the show kind of works too,. Also some of the 2D mixed with 3D animation can be very distracting and look very tacky. But as I said, these are nit picks, the show is still very good fun.