The first thing you need to do, is stop being so hard on yourself, stop comparing yourself to others, stop beating yourself up, and feeling like you're not good enough, that you don't study enough, or don't read enough. You are good enough, you yourself are enough. If you weren't good enough, you'd be getting kicked off the course. You're obviously very bright, and conscientious, and aware of what and why you're feeling like you are.
It sounds like you're stressed out, and that you're having a wobble, my dad used to say that if you're worried about something it means you care. You said that you enjoyed the course at the beginning, why did you enjoy it? Once you figure that out, you can start thinking about the course in terms of that, you're doing it because you enjoy it. Don't think about future employment, or specific jobs, and salaries. Just find the joy in learning right now. You're gaining knowledge in a subject you enjoy, that's enough for now. Also please go to student services and get some support, they can be brilliant with things like this, and especially after Covid, there's bound to be a lot of stress surrounding exams, tutoring, and stuff like that.
Also with any degree, there are transferable skills to different careers, your future job isn't necessarily set in stone.
I dropped out of uni at 19 in my first semester, it one of my biggest regrets. I then enrolled at the OU and dropped out again at 25, 27, and last year at 34, in total it will have taken me 12 years to complete a 3 year degree, I'm retaking this year for the second time, and I'm hanging on by a thread, if I drop out again I won't be able to finish my degree.
My tutors are on strike at the moment and I'm drowning, literally, I'm about 6 weeks behind in my studies and I don't know where to start, I have 2 more assignments then an exam, thankfully it's a seen exam and I can study to the questions, but I still have the guilt, anxiety, stress, shame. I do have ADHD, but still.
I hope I'm not coming across as condescending, that isn't my intention. Look up imposter syndrome, where even though you're fully capable, you feel like a fraud.
Good luck, I fully believe that you will be OK, and that you will finish your degree, and that you will do well in whatever career you choose. 