I'd recommend to identify computer games that are good for you and your mental state and play them when things are not so great.

You can be someone else for a while, with solvable problems and their own emotions. Competitive shooters are probably not so great, but light-hearted adventure games can be, or calm simulation games (Stardew Valley is well-known for its meditative effects for example).

Having been way too close to that, I suspect that most of the drugs/alcohol didn't cause the suicides, but rather were taken after the decision had been made, to make the passing easier. That's pretty grim, and there's probably no way to know.

At least for me, being lit makes me happier for a while.

In any case, staying drunk isn't a long-term plan, for sure.

I don't know about depression, as I do not suffer from it, but I do know getting drunk during a PTSD episode is a sure fire path to suicide. PTSD suffers actually have a higher suicide rate than depression and alcohol pours flames on the fire if someone with PTSD uses alcohol as a way to try and numb the episode.

Huh. Well, probably conditions differ, and we're all unique. Definitely each of us needs to be their own scientist. Good luck.