Maybe try a not-for-profit or a social enterprise as many of them are trying earnestly to solve difficult problems (climate change, obesity crisis, opoid addiction, access to clean water, homelessness, better treatment of animals, decreasing electronic waste, etc.), and they are not bound to any particular locale.

As Martin Luther King once said: "it's always the right time, to do the right thing", and as some other commentators have stated, many 'good' people are trying to improve our world - it's just that the tech bros often have better PR teams and that all important 'network scale'.

Hang in there, the dream is definitely still alive :)