I would recommend you to switch to Dota 2.
In the first games you will probably see a lot of leavers (because some people just want to give the game a shot and may just quit), but once the MM "found" your actual skilllevel the amount of leavers significantly decreases.
You can see your stats on either

or

(for that you have to enable "Share Match History" on the options).
You can see the amount of stats you get in those 2 examples:
