I enjoy the game. Reading the comments, makes me see that ZOS hasn't done a great job of showing new players all it has to offer. I think my greatest memories are just meeting people, and doing some of the harder dungeons and feeling a sense of accomplishment. Now to the complaints I have seen:
"I feel like I could do anything at level 15". OK, jump in PvP and let me know how that works. Do some of the new DLC dungeons, then hard mode then the trials. Let me know how easy those are. Go fight a world boss and get one/two shot or miss a mechanic and die. Ya' know they aren't throwing you to the wolves at level 15. No MMO does that... why do you think at 15 you've seen it all? Just because you can run around the world and not get molested by trash mobs?
"Controller" complaints. Yes, this game is made for the controller. In fact, I quit it when it first came out, because playing it on a keyboard and mouse is awful and they didn't even support a controller back then! I think it took them years to add that to PC if I am not mistaken. If you play this on a keyboard and mouse I feel sorry for your wrist.
"CP complaints" Really? They can't win. If 50 was cap we would all complain there was nothing to do. They give extra rewards, and people complain. Past 400CP you really start to see diminishing returns. I still think of a 400CP player as a beginner(me) - I have been playing for 2 months and I am at 400CP. Your first 160 CP come in at an accelerated rate(I believe I got 24 CP after a daily dungeon run and 100% XP buff). This is just a part of any MMORPG nowadays. Except in ESO you can hang out with the max toons and continue to level up.
I think Tamriel One could have been done better. I believe it chases people off. Its too easy to out level your gear, and leveling up becomes a chore. They should have just made no level on the gear. That way you're not outscaling it. Why stop at an arbitrary 160CP, anyways? Just make it all level 1. A level 10 weapon wielded by a level 10 is the exact same damage as a 160CP weapon wielded by a lvl 50 CP 160 character. Players are being punished for no reason other than "that other game does it".
I think a lot of people don't like it, because gear is not a crutch in ESO. You actually need to be a good player, because everyone can get the same gear.