I can only speak from my American experience, working as a software engineer for ~12 years in NYC. I am 33 years old--I never feel too old for this. My non-tech co-workers and engineering peers respect me very much. I love them back. We do awesome shit together. I solve hard problems and make beautiful software. I work hella hard but get paid well and I love every second of it. I am so glad I do what I do and when I read about people not being respected and not loving their work, I can only suggest that you do something else or do it somewhere else. The world is your oyster. Life is short. Carpe diem!!