I didn’t like it because the pacing, acting, characterisation, action, script and overall story all sucked hard.
Pacing I understand. Acting I thought was pretty dang good. Characterization was controversial, I admit, but see my quote above for my justification for appreciating it. Script was imperfect, and I wish they excluded Doomsday, but as he was, I was surprised at how I didn’t mind him. Story was generally well executed in my mind, improved with the Ultimate Cut. I actually thought the whole story was remarkably complex, and when fleshed out in the UC, was surprisingly satisfying.