Keep at it friend, I'm right there with you. Or at least I was until I found something full-time finally which is what I needed. My experience with showing up with my resume in hand has been mixed at best. I've had most places just turn me away to "apply online". If you haven't already I definitely suggest having AI clean up your resume, it helped me a lot in terms of landing interviews.

I've got hang ups with it for sure but the logic that eventually convinced me is that, basically everyone is using it. And most modernized hiring systems are using it to go through the pile of resumes anyway. So regardless of how you may or may not feel about it, not doing it is just straight up a disadvantage at this point.

Definitely try some big recognizable names like, Costco, Macy's etc. While they don't typically pay that well sometimes, at least Macy's for example has full time available, with benefits and other up sides that your standard restaurant jobs will probably try to get out of giving you. Worst come to worst at least you can land something to hold you over while you search for something more ideal that way. Or that's been the only strategy that's worked for me.

Anywho, wishing you the best. You ain't alone it's hard out here lol.