Well I'm over 50 and gaming is still a hobby for me.. my parents don't care anymore
Regardless of how she actually intends her criticism you can choose to look at it in the light of she just wants you to be happy/successful/have a good life. Whether the criticism is warranted or not is almost irrelevant, it's your life and you're allowed to make your own mistakes and allowed to take or not take feedback from your parents into account. Sure it sucks but sometimes you can just say "look, I know you think I should be doing this, but can we talk about other things today?" and try and talk/do/whatever positive things too.
That said I find that it's ok to inconvenience myself a bit to make my mom happy, she's not going to be around forever. I mean line dancing feels like it's over the line lol but maybe something else that she'd think would be good for you.