Can't think of any truly terrible games that I've played, merely ones that frustrated me so much that I didn't bother proceeding.
I haven't played Limbo of the Lost, but in case you're interested
here's a journal of a guy who played it and lived to tell the tale. Set aside an hour or so to read it, as it's pretty long and detailed. Set aside a reserve of mental health as well, because by the end of it I was pretty close to gibbering.