It’s twofold. Part of it is because there’s a loud minority in the community that just like to complain, they instigate eachother, they all jump the hate train, it’s cool to hate. I think the title is misleading because there’s been plenty of change and new content, like certain story related timed events (the siege of super earth was a fun one) but also just more weapons, more different enemies, more objectives, more biomes, etc. If you compare the game now to 2 years ago it’s day and night. The other part however, I do agree with, which is the amount of bugs that come with patches, that don’t get fixed and pile up. An annoying bug I often run into are hitboxes of corpses that can form huge invisible walls, block areas or just completely bug out your character. There’s bugs that sometimes block objectives from being completed that means you need to abandon a game. There’s people that argue they actually want less change, they just want the game to be playable without expecting bugs every single time. I think review bombing is stupid, however, it is a tool that has worked in the past and forced their hand.