Its a single game that had this problem (they call them BUGS, many games, hell i think all games have them) from my understanding, i dont play DOTA2, its fixed now, was a bug when it was in BETA!!!! yes beta.. You want to judge the whole system on one game in beta, don't make me start posting links (to several, heck almost all) Origin games where people have had issues. I have several hundred steam games, I have 3 Origin, 2 of the Origin games had issues, 3-4 of the steam ones have. Shit happens.
EA had a digital DL store long before ORIGIN (and even before STEAM was popular) the games where almost all priced over the boxed copies in store. There where no sales, and no attempts to make a useful for the consumer. It was something they put no effort into, they simply didnt care. STEAM came along and did it all WRONG according to EA "sales and free games devalue products, we would never go that route, its not good for the dev or the end user" (sorry, that is not an exact quote, but its close). Now Origin mimics steam.. sad. SWonline comes out, a top EA executive, before its released says its garbage (he was fired, do some googling). Now even if the game was, you gotta be smart enough to know not to say that.
a Bully is a bully even if when the teacher is watching and he is nice. EA will SCREW the end user as long as the sheep keep letting them. BUYIN all access to NFL, cant beat the competition with your game? Just make it so they cant make a competing game. I quit letting them when Bullfrog was destroyed, Westwood was destroyed, when Origin (you know, Ultima/wing commander) was destroyed, (can mention about 5 other companies at least) when they said one thing (see above about devaluing products with sales) and did another, copied steam, when they said OnlineDRM (Sim CIty) all the time "had to be done, game was designed that way" when it was proved it wasn't and ran just fine without (hacked).
now please list all the Harm VALVE has done to companies, I have no doubt there are some, so please list them. Im not thrilled they forced STEAM on us.