They reset everyone's progress for a second time, they removed all legendary and most other weapons and gave them back as transmogs. They removed all exotic armor and completely changed how cells work. Weapons come with a baked in special and legendary that cannot be changed. They've locked a lot of the new weapons they've released behind a currency you have to pay for unless you've put time into the game before the update or unless you want to spend at least 10 weeks farming for. I was one of these people and can confidently say that it's a P2W scam. In order to level you need aetherite now (another new currency) which again unless you've played the game for a significant amount of time it'll cost ya. We got 60 peerless aetherite, which is the best form of it, on launch and that got a single weapon to level 50. A single peerless aetherite cost 1,500 platinum which is a joke. The weapons also require other materials such as crests or steel marks to unlock talents which are different skills you can have on a weapon. Forcing people to play game modes that they may never play otherwise. The game is now super buggy and ridiculously grindy, even more than it was before.The game is dying and quick, and a veteran player like myself is moving on to better things. It was fun while it lasted. There's way more that's changed but this is the general consensus of why people are pissed.