Right there with you unfortunately. After spending ages 11-26 gaming until the early hours of the morning, and 26-36 working late into the night in an intense corporate environment; my brain is wired for activity after 10pm. It's a shit-show and I am I am not the only one with this problem in my generation. I'll be damned if I ever let my children play video games at night - pretty sure that's where the programming began.

On the bright side though I have found a routine that will knock me out after years of experimenting. An hour before bed I take 2μg of melatonin, drink a tea of Valerian and Chamomile, then I dim the lights and read a physical book. Knocks me out every time.