This is totally valid and understandable. Do you find yourself feeling this way in media as well; like TV shows or movies? BoJack Horseman comes to mind when you mentioned unlikable characters you are supposed to root for. I can't say that I've had that experience within a book but I do find myself in certain shows rooting for some characters that are assholes or unlikable.
I can't say that I have found much humorous works -- though I haven't particularly looked for it. The best I can think of is Christopher Hitchens' "Hitch 22" memoir having some funny moment in there. Do you have any recommendations?
I am the same way with not reading more. It is why I choose super thick books to try to make the experience last longer if I like it. I end up rereading the same things until I might stumble upon something else. Is there a book or some books you find yourself rereading for comfort or extended enjoyment? I imagine this might be more difficult with fiction.