Not a doctor but I think it would be unusual if you start going to bed early, and at roughly the same time every night, exercising, drinking water, eating healthily, cutting out sugar and following some relaxation and calming exercises and THEN noticed that nothing changed and you still feel awful on waking.
So if all of the above basic things are in order, and you are getting enough hours sleep, you not under any form of stress that is leading to insomnia, and you are not waking up multiple times for a child or a pet, then maybe look at your sleep environment?
Do you have enough fresh air, are there too many blankets or duvets, do you have an allergy to dust mites or is there something potentially allergenic in your room? I feel utterly dreadful on waking if the room is too warm.
How about your mouth and nose? Do you snore? Maybe get a monitor to detect sleep apnoea or irregular heart rhythms? Sleep apnoea can make you feel dreadful during the day.
How about menopause? Hot flushes and hormone disruption can lead to sleep disturbances.
Obviously if you are worried about any aspects of your health then see your gp
or go and see one to rule out any potential health issues.
Good luck!