I'm not saying I'm guaranteed to be better than you. I'm just saying that your statement of "I'd wipe the floor with all of you" is pretty out there.
And as for DotA, you can't be upset with that. Everyone has to start somewhere. I'm sure people were upset when you first started playing, as they were when I first started playing. There's always going to be new players or bad players.
If that really bothers you that much, get yourself 25 wins and go play TDA. Or better yet, join a clan.