Don’t be too hard on yourself as there are a range of factors which come into play.
The very advantage of a dating app also happens to be its biggest problem which happens to be the option of having many to choose from. You’re not only competing for her attention but also against thousands of other guys in the same pool as you (based on your location/age etc).
All you can do is control your outlook here. There could be plenty more rejections down the road but do not let these instances downgrade your self-worth. Hope you find someone who likes you for who you are.