SAME.I'm not going to live this down, but...Morrowind.
It's pretty apparent that it only gets praised by most fans cause of nostalgia, IMO. Of course it is a far less "casualized" and a deeper RPG experience than the later games but holy hell did it age like yogurt. The chance based combat system being the worst offender of all which, combined with the insanely slow movement (even when you run), makes the game an absolute chore to play.
The only thing it really has going for it is the lore and atmosphere (damn, now that I think about it my opinions on Morrowind and DMC1 are so dang similar). I had to resort to console commands to get any enjoyment out of playing it and even then I dropped it after a certain point. I just couldn't bear the boredom after a while.
If you want to visit Morrowind but have a much more fluid experience wait for modders to finish Skywind.