As a "in my 40s" gamer I have seen some pretty big changes in what I play and how I play games over the years. There's bits I miss, bits I think I am better without but recently it's been something I have found an acceptance of. 20s me spent some many hours on a couch playing all sorts of multiplayer goodness, 40s me can't remember the last time anyone other than my partner played a game in the same room as me. 20s me would be all in on a AAA banner release and pick up any first person shooter that looked vaguely average or better. 40s me gets done in by the constant shooting in games but will happily while away hours tending to a digital farm, driving digital trailers across Europe or lose my mind trying to create dishes for demanding customers at my digital food truck.
Most of these changes came about naturally enough - peers get older and social time is spent out rather than in, people have kids, not having the most recent gen of consoles, the perpetual violence and horror on the news make some games leave a bad taste on the palette and such. I think my moving away from the mainstream a bit more has meant I've avoided a lots of the traps of monetisation and season passes etc. which is no bad thing.
I hope you find and settle into a gaming place that makes you feel better, it also sounds like work-wise and with the D&D stuff you've filled or are filling the gaps left by dropping off gaming nicely though. And if you can get overseas teaching that gets you away from the anxiety inducing shitstorm the UK seems to be thrusting upon itself go [clap] for [clap] it [clap]. As a teacher recently made redundant it's a nightmare in the adult learning sector. Were it not for commitments to supporting older members of the family here I'd be seriously looking to find a post further afield (although I have no idea where, everywhere seems up to their neck in it at the moment...)