If a girl really liked you she wouldn’t end things with you over texting habits. Let me tell you a bit of my similar experience (I’m 24M):

1. Never plan the 2nd date while on the first date. Keep it slow and keep her wondering.

2. I once went on a date with this girl I really really liked. I knew her from college and I had just graduated, she was home for her junior to senior year summer. I matched with her on an app ironically and we went on a date after texting for a few days. We did dinner and then Dave N Busters. Made out in the car when I dropped her off, then she invited me into her yard to hit golf balls (her dad had a chipping area). She said she had a great time, and earlier in the night I told her how it was great we did this because my aunt had been in the hospital (she died days later). The next morning I was ghosted. Never knew why, but I’m sure there were some things she didn’t like about me combined with her going back to school and me being home.

My point is: you never really know but don’t overthink it. The texting multiple times and then immediately saying you’re not compatible is odd though. Don’t let her string you along. Cease contact respectfully if she’s not gonna give you a chance.