sad rant :(

Am I not supposed to be here? My whole life I thought I was a scientist and a good student. Now I'm in my third year of my PhD and I hate it. I'm stuck on a project I don't care about and I dread waking up to work on it every day. I ask my advisor to switch projects and try to come up with new ideas, but they get shot down with no helpful feedback and also comments about how a project shift would delay my graduation timeline. I can't even bring myself to read papers or listen to my cohort talk about their science because I just hate it all now. Science as a whole has become something that makes me angry, rather than something I want to devote my professional life to. I should talk to other advisors to get other inspiration, but I can't bring myself to read their papers or even think shallowly about what they do and how my work could overlap with it. People ask what I want to work on and what I'm interested in, but at this point I can't think of anything that sounds "fun". I just hate it all. Am I not cut out for this? Am I just bad at being bad at things? Do I not know how to learn on my own? Is it my fault? Why am I the only one who seems to be having a hard time? When did this happen to me?