That doesn’t sound like burnout. That sounds like cyclical depression or maybe even bipolar disorder.
You should discuss this with your doctor. There are a lot of things that could be driving this and while it might be job related, it doesn’t sound like it’s specific to one job.
Most people aren’t exactly excited to go to work. Finding something you are passionate about might help a bit but it’s not always viable. Better to find a way to reframe work in a positive light or find a career where you are helping someone or teaching someone. I work in Healthcare and while it can be stressful long hours it’s rewarding when you help someone or I have a student that I can teach.
I think if other options are exhausted you might benefit from medication to help with the extremes you’re describing. Although that’s of course a discussion you should have with your doctor.
Well a component of this is probably finding a job that is going to work for you. Easier said than done. If you’re in university you should focus on trying different things and just getting experiences in different areas until you find something that clicks. Push yourself to try things that are scary and intimidating. Pick something that you arent sure you can do. You will be surprised what you can accomplish and that success will foster more focus and drive in you. Consider jobs where you don’t know what you are going to have to face. I never know what my day will look like. Yesterday the electrical system in the hospital had a power surge and we had to navigate through that. If it’s interesting you’ll never be bored and you’ll never really lose a desire to go do it.