Just my opinion, but... all your happenings (or at least the ones you share with us...) seem to have the same theme...
You're hyper-attentive on the sex part, and every thought and decision is based on what physical attention you're gonna get from it. Have you tried just the sex part, and NOT trying to DATE people. I'm sure they can feel that connection is muddied with the getting to the cheesey nachos part too. (and the entitlement of it all- no one owes anyone shit... even in dates...) It's not gonna help anyone to kid yourself.
She's got shit going on, she's from a dating app, no loss, no worries, just move on
(and three weeks is fucking nothing...o.0)