We only bought the game to play against bots in Portal mode

I'm with OP on this one. As an older player I want to have casual fun and that isn't always achievable with actual players. I also happen to be a trophy hunter and MP trophies (especially ones that can't be collected late in the games cycle) I absolutely despise. I get that this is a MP game first and foremost but it could be MP with bots. Allowing a certain level of 'other game mode progression' in certified game modes whilst allowing full trophy hunting etc would be a fair middle ground IMHO.