Is this clone going to be more of the same?
Having played the beta quite thoroughly, I can confirm your fears. I've never played a game with a higher asshole/player ratio. The people online are at best belligerent and unwilling to offer help, and at worst truly unique jackasses. None of the community has any tolerance for new players.
That said... playing that game has been the highlight of my gaming experience in the last year. If you are willing to pick up the game, and willing to be yelled at/dumped on constantly until you get decent at it, it really rewards with awesome gameplay.
The thing is, the game mechanics really punish new players. If you are dying repeatedly, and not using abilities when you should, it greatly
helps the other team, and really injures your own. So, a large amount of frustration from your teammates is inevitable.
It's certainly not a game for the timid. If you are interested in trying it out, I recommend reading up a lot on the heroes and items before you play online, and just keep making a game called, "My first time" (Even your 50th game should be called this) just so people know what to expect when they play with you.