I'm sure there's more to it than what you can put into a forum post, but like others point out, her view of your hobby sounds concerning. No hobby or interest, as long as it does not become an addiction or detriment to your life, should label you as a "loser". Doesn't matter if it's gaming, trainspotting, watching tv, or whatever. Any reasonable open minded person should agree to this. Gaming certainly still has a stigma, and that may be why some people look down on it even though many hobbies aren't really that much different. But I reckon you should talk to her specifically about what it means to you and why it bothers you.
No wife here but my girlfriend enjoys watching me play certain types of games. Currently Elden Ring, which freaks her the fuck out to my great enjoyment. I try to include her in the game I'm playing when she shows interest in it, involving her in choices, commenting on what's happening, asking her what she would do. I think it helps a lot that she understands why I am drawn to games, even though she isn't herself.