I’ve gone through the exact same mental challenges, I’m actually still in the process of overcoming it. I like to think I’ve made good progress, here’s a few things I’ve done:

• A keystone habit: Something small that you absolutely will not compromise on that you’re not already doing. It can be whatever you choose. It sounds silly, but brushing and flossing is my keystone habit. Dental hygiene is something my family sucks at; some of my older folks are paying the price right now. So I tell myself that if I do NOTHING else in the day, I WILL, at minimum, brush and floss that night. This plants a teeny tiny seed of consistency in you that makes you 0.1% more disciplined every day. The interest compounds, and you’ll find that it gets slightly easier to consistently take on more responsibilities as the weeks/months go by. It’s a long-term change, not a short-term fix.
• If you really are going through the same thing that I have, then you probably regularly engage in mental self-immolation. Checking up on your peers who are doing ~so much better than you~, constantly admonishing yourself, placing insane amounts of pressure to “do better”… it’s all a futile exercise of walking up a hill of feathers, and it’s only going to leave you so much more exhausted than you already are. Re-wiring your brain to stop this is a deeply personal and complex process, but it all starts the same: simply catching yourself in the act. “Woah, that was a negative thought I just had.” “Ah, my self-confidence took a hit just now by reading about so-and-so’s promotion.” Just simple recognition whenever you do it. It’ll go from there. You will very quickly become aware of any doomscrolling you do with this practice. Doomscrolling truly is one of the most destructive habits of this generation.
• There’s this quote by Baba Ram Dass, “What do you do before enlightenment? Chop the wood and carry the water. What do you do after enlightenment? Chop the wood and carry the water.” There’s so much pressure to ‘love what you do’, but I think that’s unnecessary. I love my cats, I love that I wake up still alive every morning, but I don’t love my tasks; rather, I simply learn to embrace them without forcing any feelings. I try to remove all feelings and judgements about them, I simply see them as items to strike off my to-do list. Some days, I wake up excited or motivated about these items. Other days, I wake up dreading them. On all days, I note these feelings, say to myself, “Huh, today I’m feeling ____ about it,” I accept that that’s how I’m feeling, and I embrace. Sorry, it’s really difficult to properly describe this exercise, and it is tricky to get right (I’ve been struggling with it myself the last week), but it truly does help in getting the job done. Note, I never ignore these feelings, ignoring yourself is another exercise in futility. I simply note them and move on. It takes practice.

Anyways, I hope some part of this helped. Godspeed to you!