Do you ever just tell potential partners you are asexual?

I haven’t been attracted to someone really in like a year and a half to almost 2 years. I find myself immune to even getting crushes even if I do get to know someone a little, I simply just don’t feel like entertaining anyone. I’m super picky for a partner, most like all of us and have other things I’m focused on. It does happen where unattractive guys will become interested in me tho and I’m wondering if telling them I’m asexual would be the easiest to cut to the point of not being interested. Also when I say “unattractive guys” I don’t mean physically, it’s the guys who don’t have much going on and simply exist to work and play video games. Not really having a life they work on is super unattractive to me which I noticed is most guys my age or really most in their 20s-30s. So my question? Do you ever tell people that you’re asexual to avoid the potential of them gaining feelings for you because you know you’ll never like them? Do you think it is a good move or should I do something else?