I have had it proven by staying overnight in a sleep lab to have severe delayed sleep phase onset disorder, and two other sleep disorders. I had to work second shift before and now I work at home in a part time job for my husband, thank God, or I could not work at all. The sleep lab director said with my my brain wave patterns, I would never naturally fall asleep before 2 am without drugs, which is true.
Research I've read shows only 10% of people are "morning" people, 20% are night owls, and the rest are pretty flexible. All of society does seem organized for the early birds though. Many of our ancestors, before electricity, used to sleep in two sections, since it was dark outside for so much longer than anyone needs to sleep, and often would visit neighbors in the middle of the night, then go home and go back to sleep.
I also have depression that is much worse in the morning, so much so that I will not make appts. to go anywhere in the morning unless I must, like fasting lab tests. I am a really angry beotch in the mornings, and/or so sad I can hardly stand to be conscious. I often make plans to do things at night like a not depressed person would, and the next morning think I must have been insane to think I would do that. It is like being two different people, though I find the sad part of the day is lasting longer and longer now.
I do not have ADHD though. Melatonin makes me hallucinate to the point where I do not know if I am asleep or awake. It scared me so much, I won't touch it again. For me, large doses of L-tryptophan work better. I am not trying to discourage anyone from trying Melatonin. I also have two other sleep disorders, which may be part of why I react that way to it.
Another thing that is supposed to help your body keep making natural melatonin all night is to use no blue lighting during the night because it stops melatonin production. In other words, keep amber colored, blue light blocking sunglasses on your night stand and wear them all the time if you get up at night, or use red xmas bulb night light bulbs only, no white or yellow ones. Get rid of digital clocks with blue numbers and get red ones, no TVs, computer screens or phones on unless you wear the special amber glasses. I just use red xmas lights in a size that fits night lights, since I also have balance problems in the dark and need lights all through the house.
I do have loads of strange dreams, some repeating ones. I think it's great you are journaling your dreams.
You are certainly not alone with this problem. I saw a video awhile back of a couple on YouTube who are part of a group of empaths who live only at night in order to enjoy the benefits of city living but without having to put up with the hordes of people and resulting overwhelm. They sleep during the day and are up all night. That won't work in most places, but in NYC and similar areas it would be an option.
There may also be a need for you to shield before sleeping, as entities who do not have your best interests at heart can get at you and take your energy much easier on the astral plane when you are dreaming. I just affirm that my shield is still up and will remain up all night and that nobody can take my energy, before going to bed. This has helped with morning energy, but not with mood. I would give anything to ditch that depression. I have serious medical problems, but all of them together don't hurt as much as depression does, so you truly have my empathy.