I've been where you're at, and speaking frankly, if you don't make some changes, it'll only get worse. It sounds like you're tinkering at the edges but that can only get you so far.
Ramen, bacon, beer, cola, weed...
Maybe cut back or eliminate those for a few weeks and see how you feel? It's obviously way easier said than done but I can almost guarantee that cleaner living will bring back some of the lost energy, and once you've got more energy it gets a lot easier to get (and stay) on track again.
Seems like I'm doing the journey the other way around. I don't see much point in maintaining healthy lifestyle if the effort of doing so is higher than the reward. If I'm tired either way, then why bother.
What you wrote sounds like one extreme to the other. There are alternatives to beer and ramen that don't require extensive cooking. If you really can't muster any motivation at least check the canned food section at the grocery store and consider pairing with a rice cooker.
From your other comment the root cause definitely sounds psychological. I'll note that negative health consequences will only exacerbate that if and when they eventually start to accumulate.
Ramen, bacon, beer, cola, weed...
Maybe cut back or eliminate those for a few weeks and see how you feel? It's obviously way easier said than done but I can almost guarantee that cleaner living will bring back some of the lost energy, and once you've got more energy it gets a lot easier to get (and stay) on track again.
Best of luck.