Time limit is the greatest thing ever, it inspires tanks to keep pulling, provides bonuses for speedy completion and makes people think twice before joining if they have to afk a lot. If it takes more than 90 minutes everyone is failing not just 1 person. So assess what you did wrong and learn from it... don't cry to developers because you lost.

Seriously though why play a game if you aren't going to play it but demand its changed so you can do it without gaining any skill or learning anything. If thats what you want go to a different game.