Brink overpromised and underdelivered in every conceivable way. Nothing lived up to the staged trailers, dev blogs and community interaction from Splash. The smart system ended up being a glorified gimmick that had no real impact on gameplay. The game itself had serious technical problems both related to stability and performance. The game featured an incredibly obtuse attachment system, largely meaningless character customization and a frankly bizarre SP/MP format. If all that wasn't bad enough it had very flawed team objective gameplay, marred heavily by poor map design which was previously a Splash Damage strength. They ended doing jack and shit to support it which was the icing on the turd cake.
I can't think of a game that disappointed me as much as Brink did in the past few years. Ok wait, Dragon Age 2. Not exactly the kind of company you want to be associated with