I work 50+ hours in an unrelated field and still find time to work on film.
To be honest, if you love film, and you enjoy making it, then you'll make one and you'll feel satisfied.
If you love the glam and the pat on the back from friends and strangers for being a rebel and not getting a conventional job, then stop. You're not better than a lawyer or a doctor or a businessman. They chose their passion and you chose yours, we're all in the same boat and you just happen to like film.
When I was 20, I went to school full time for an unrelated degree, worked part time and made and sold a film in Los Angeles, so yeah, it's hard, but if I had complained about wasting my time on unrelated things, I would've never made it. It's all about grit, and the greats for any profession have a ton of it.
This is just life advice: work hard on everything, even your non-film jobs and stop complaining