I’m the same way. Exercise and eating healthy just makes my body want even less sleep. When I’m firing on all cylinders, eating right and working out, I can get away with 5.5-6 and feel better than I ever do trying to push up past 7 by going back to sleep in the morning.
I my experience, the most important thing is, wake up when you wake up. Don’t go back to sleep because you feel like you should, or the alarm has 20 more minutes. If you’re awake, get moving.
I feel like going back down signals to my body that this is going to be a lazy day and it should settle in, instead of firing up all systems.