Probably because the in-game chat feature has been rushed out and not planned properly before the game thus dropping frame rate drastically and causing huge game lag for those with not the best of connection speeds. The raid on hard is still plagued with bugs including sometimes not even being able to pick up the relic, crucible is a joke where players after playing for a few days at level 15 can wipe out a level 30 who's been grinding for weeks to reach that level of armour and weapons, they then try to fix that cock up with iron banner which is just as much a joke, they try to justify the lack of content with the queens wrath, they advertise 2 DLC packs with the game only to not be releasing them together, they rip off xbox users (no I'm not pissed I'm a ps4 user but I have a sense of right and wrong) by removing content from the dlc but charge the same, there are no "survival" type co-op modes or modes like zombies or spec ops in COD which is ridiculous considering its with activision, iron banners map randomisation is complete crap, the cryptarch is on crack (also who the hell wants to spend their glimmer on white items!) and the DLC only allows you to reach level 32 which advanced players will probably do within a week.........I've probably missed a hell of a lot more but you get the jist.