What are your worst dating app turn offs? Personally, I have many. I get the ick from anyone whose profile only has selfies on it (I'm a shut in, and even I manage the occasional nice picture with friends), and those who talk at length about fandoms that I find annoying. With men, I assume anybody who wants someone who 'takes care' of themselves will have a tantrum if their date is over a size 4, or hasn't shaved for more than two days in a row. Usually, guys who make a big deal of desiring somebody funny want a woman who always laughs at their jokes and/or lets them bully them; God forbid you do a bit at their expense. Also, anyone who gives off the vibe of meanness, stinginess, negging, or manipulation before the conversation even starts is an instant no.
Phew. That's not even an exhaustive list, and the worst thing is that it's built from experience. All I'm trying to do is avoid being in a situation like some of the examples below. Dating apps are far from foolproof, and anyone who uses them will run into difficulties now and then. We've just got to try not to be as much of a douche as some of these people.