Oh, those are the least complaints, because that’s just numbers. People feel leveling is sluggish again, some find that their character becomes weaker when they level up due to the enemy level scaling, a lot criticize the end of the new campaign being bad, and then there are the Eternal players who got their items destroyed for the 3rd season in a row. Other people plainly don’t want to pay 40 dollars to engage with all the content, etc.!
Have fun reading. There’s way too much to go over to tell you what’s happened to the game since you left. I mean you could always try to find a youtube video too, but those are usually so scattered with their information.