You are doing all of the right steps. You are clear up front about who you are and what you want. Ignore the people who unmatch and say bad things. You are telling them one thing and they are telling you everything about them (that they are assholes).

The thing about dating is every relationships will not work out until it does. So until you hit the one that last it will feel like nothing but failures. Also note that a successful relationships doesn't have to mean until one of you is dead. If you date for a while, have fun and then don't work out in the end that is a successful short term relationship if you don't damage each other in the process. Dating especially on the apps sucks for everyone. You are not alone in this regard. Keep on the apps and attempt to meet people IRL via groups, hobbies, volunteers events and other interests you have. People like happy people and people are happy when doing things they love.