I'm a 4th year who matched as well and I'm happy too!
There are definitely parts that I didn't enjoy. End of second year I (along with probably 95% of my class) got super burnt out. Surgery rotation. Early mornings in OB. But it wasn't anything I couldn't get through to get to what I wanted to do and I could always find something optimistic about it. Like I knew I didn't want to do surgery, hated standing on my feet all day, but I liked talking to the patients when we were able to do that, and I knew if I tried to participate/be involved somehow the time would go faster. Plus we usually had good residents. I talked to someone I rotated on surgery with and she was surprised I hated it so I guess I'm just an optimistic person lol.
I would probably do it again but I'm still really excited about being a doctor so I feel like it was worth it. Maybe because I have family in medicine, I wasn't really surprised by any part of medical school, like I ended up having pretty accurate expectations for how clinical years would work. I'm sure it would be harder if you don't have a clear picture of this. I am VERY happy to be going into the specialty I want now and being able to just focus on that, as well as get paid haha.