Don’t know if this helps but it’s not your fault. Sometimes your brain can just screw you over, and you can only try your best… willpower is a resource your brain gives you, not something you can decide whether you have. If you try your best to make yourself do it, and it wasn’t enough, then you can talk to your therapist about it or try again later. What you’re doing may seem like a small task, but if someone else had your brain they’d be having the same issues. Try to show yourself kindness, anyone can struggle when their mind sabotages them, and it’s not your fault.
Don’t know if this helps but it’s not your fault. Sometimes your brain can just screw you over, and you can only try your best… willpower is a resource your brain gives you, not something you can decide whether you have. If you try your best to make yourself do it, and it wasn’t enough, then you can talk to your therapist about it or try again later. What you’re doing may seem like a small task, but if someone else had your brain they’d be having the same issues. Try to show yourself kindness, anyone can struggle when their mind sabotages them, and it’s not your fault.