It's not quite a 'character' in the same sense as Al Murray/The Pub Landlord, but it's an exaggeration for sure. I'm not his bezzie mate by any stretch but I've accumulated a few hours chatting in his workshop; my personal estimation is that it's a venting or representation of the accumulated annoyance at crap airsoft guns and crap airsofters he's been dealing with as his full time job for 20 odd (? +) years, as a site owner and tech. Personally, I'm genuinely surprised he's not changed career path before, but he's said he's been close a few times in videos, I imagine the positive aspects just about outweigh the negatives - which tbf is a bit easier to happen when it's your primary income source vs just a sunday game for the rest of us.
Like infantry blokes don't love digging ditches in sennybridge in winter, but some still serve 30+ years (obviously there's less digging after some years but anyway).
I won't comment on things he's told me to my face but not aired publicly, obviously he shows he likes a beer or rum (which I may well do myself in his job), but I can say with a decent degree of confidence that the mannerisms and how he acts are nothing to do with any sort of drug/s. There are other factors that are not any sort of bad decision he's made in life.