I can't answer why its happening, but as a man, this is almost the exact experience a lot of us men have on dating apps if we even get matches. Lots of little dates and chats but it rarely ever goes anywhere so i can offer sympathy on why that feels frustrating. Tbh i think meeting people in real life is better as you can gauge the chemistry between two people better irl than over texting. The hard part is that for many young people there are not a lot of places outside of school or work to meet people anymore. Many of our aocial spaces have shifted to online spaces and human relationships aren't fully prepared to catch up to our ever increaaing digital world.
If you feel overhwlemed and burnt out by your experiences online and going on so many dates i would recomend just taking a break from the online dating scene. You're still very young and the world is full of oppourtunity to meet someone who loves you.