Why has the new Shadow of the Tomb Raider game been getting so much hate? (warning some possible spoilers)

I just don't get it. I loved the game. I had a lot of fun. Good graphics, beautiful storyline, fun gameplay and a satisfying ending. I just don't understand what's wrong with it. I've been hearing a lot of "awful ending" and "boring storyline." Seriously I don't get it. I found the ending very beautiful and satisfying for the finale of the Tomb Raider origins series. What do the people expect? Some god awful ending where it ends with everyone dying and Lara is left all alone or something or have it end on a cliffhanger that will probably never get solved since this game is apparently the final game of the origin series? I just don't understand what they want. I mean I've seen some "they should've had her be introduced to her iconic two pistol combat" which I get. That would've been a nice thing to include. I swear, I think a majority of these haters are just a bunch of drunk teenagers who just want to see her naked and show off her big boobs and also just don't care about good endings. Me personally, I'm just a sucker for a happy ending.