Frustrated with dating apps

I'm so annoyed that none of the dating apps seem to let you filter by sexuality. I finally decided to pay for one of them to see who were liking my profile only to find they were all allosexuals who presumably liked my photos but didn't read my profile.

It's so disheartening, I know there aren't many aces out there but I'm in London so you'd think I'd have a better chance of meeting someone than most!