Upsticks and leave. Whereever you are you can probaly go and do wha you do somewhere else. I would pick a whole other country, you could pick ones that align with your interests like philosophy and cooking - places where there is history or active communities in those spaces.

As for making friends, join clubs. Start running, playing board games, cold water swimmimg, etc.

If you are looking for purpose and you don’t mecessarily care about money you could make a huge impact in charitable works. If you don’t like human contact you could volunteer with animals.

You are at a crossroads in that you feel jilted and stuck but in reality you have nothing keeping you in one place. If you save 70% of your earnings for multiple years you are in a position to just stop working while you figure it out. You are in a position to take a pay cut and find something you enjoy.

I know a few people who were in similar spots and one became a data analyst for a charity - less hours and he can see changes being made by his hand - and the other travels to meet the elderly to record and archive their memories for posterity.

You could do absolutely anything.