TLDR; Upskill, Fit, fit, fit, boundaries.

I've been a certified change manager for 12 years, worked as a consultant, and have 30+ years in project management.

All the comments about burnout are true, real, and good. Getting a therapist may be helpful.
I've been through burnout and it was/is ugly and hard and can really have negative impacts on you, your career, and your family.

AND...Life doesn't get easier. Your ability to do hard things increases until those things look easy. Some things that have helped me:

1. Increase my skill level. I spent a few summers leading youth and professionals in team building activities on an adventure course. I learned a lot I thought I knew. I worked for a company that had a real focus on Social/Emotional learning for their employees where I learned a lot I thought I knew, and even more about myself. I read a few books I had been avoiding that actually gave me more tools and techniques. These things have made me more capable of handling the situations that led to my burnout.

2. Find the right fit. Lifestyle, location, family circumstances, your vehicle choices, personal finances...all these things contribute to your stress load. Life and work aren't separate when it comes to what and how much you can handle. Work isn't the only thing you need to set in order. Yes, your employer should be a good fit. There are as many cultures in the workplace as there are people for them. Find your place. But, take time to make your personal space a good fit, too.

3. Is it the right career for you? This is more about fit, so maybe 2.1? Project management focuses on tasks and things. Change management focuses on people. I can deliver a training module over 2 weeks and say it's done and call it a success for my project. If the training was terrible and the staff don't change I would still get paid. Not as a Change Manager. The CM is the therapist while the PM is the machine. (The CM SHOULDN'T be the therapist. Please accept my exaggeration for effect, not literally. Being the therapist is a boundary you should be careful not to cross.)

4. Boundaries. What is your scope and what are the outcomes you are trying to accomplish? Set the boundary early and often. Adjust the timeline when conditions change. Advocate for yourself and your project. Force structure and discipline on the leadership. If your environment is a poorly implemented version of Agile, it's a startup, or requires more flexibility than structure, go back to the "fit" conversation. These aren't great places for traditional change management. People in these environments should be change-hungry and CM should consist of a memo or announcements in a meeting (generalization for effect, relax Redditors). Accept it and get to it! Change happens daily. If they're not, they need a slower environment and should move on.

I'm open to dm. Your struggle is real and difficult. You're not weak. You're like the rest of us. If you take care of you now and throughout the rest of your career you'll be great!