That really stinks that you have unfortunately found some of the most self-centered people in the world. I think it is a symptom of THEM not wanting to say "no thank you" and rationalizing that ghosting others as the easier thing to do for THEM if they really didn't want to get to know you. Screw those kinds of people! Please know that there are people in this world who find ghosting extremely off-putting. The only acceptable time to ghost someone is AFTER you have already ended the friendship/relationship and they continue to pester you since they have already been clearly informed that you are not interested.
As a person who is highly introverted, yet still desires contact with high-quality people, I do continue to put myself out there strike up new friendships with like-minded people. If you are relying on dating apps to get dates, I would say to remove those from you phone and just seek walking, running, hiking, table top gaming, etc. groups to meet people in a low pressure way. That is what I did and how I met a lot of people who I consider friends that let me know if they can't come to a gathering for whatever their reason. I joined lots of groups until I found my people in a city of about 120,000ish in the USA. It may take a long time to find your people, but when you do, you know.