Don't feel bad! I'm the same age and I'm a daily player. I don't really get any flack for me playing (and trust me, I play every time I have some down time) besides that I don't engage with the world when I'm playing because I get so into it! Anyway, you're never too old for pokemon! I don't really keep up with the show, but I will youtube an old episode like "Hey You, Pikachu!" when I'm feeling nostalgic. So, in short, continue to train without shame!