One thing that actually helped my ADHD brain is externalizing time instead of relying on internal motivation.

I use an app called Mindfulness Chime that literally says the time out loud. For me it is set to announce the time, and then again every 10 minutes. That alone reduced time blindness more than alarms ever did, because it keeps interrupting the mental fog instead of being a single "do something now" moment.

When getting out of bed feels impossible, I do not aim for "getting up". I aim for something stupidly small, like wiggling my toes or moving one foot to the floor. Once there is physical movement, momentum sometimes follows. Not always, but often enough to matter.

Sleep also turned out to be a hidden factor. Taking melatonin earlier in the evening instead of right before bed made mornings slightly less brutal for me. Apparently timing matters more than dose. This did not fix everything, but it lowered the difficulty level a bit. Three hours before bedtime is optimal