wheatrich - you are right, if you are solo queuing into games and are a newbie you will unfortunately get a lot of hate. BUT after a number of games you will be placed into games with equally new players so it will get easier.
I strongly recommend you find a ton of people on
http://www.reddit.com/r/Dota2pubs who are total noobs also. If you queue with a full 5 man team with laid back players who wont be toxic, this game is going to be a really fun experience.
If you are still gonna solo then try to grow some thick skin and remember there is a mute button in case there's a bad apple. glhf
p.s. "just seems kinda obvious who's going to win just a few minutes in every game" It does seem that way but its very far from the truth. come backs are a big part of this game, those are the most fun games to win imo.
There is a reason why they didn't implement a forfeit feature, people would give up way too much and you would never understand that huge come backs are very possible. Good team moral and a little coordination can out-best even an insanely fed team.