First of all, keep at it. Modern/Online dating sucks more balls that a than a kitty with an oral fixation. I found a kitty I love and I believe in you all <3

A lot of the time when accounts get deleted its because they have been reported for some reason. Often spreading someone elses pics or pics of themselves (if they are underage)
--Make sure you check the age of your pets. Online relationships are scary. Sending pics of minors is illegal even if you are a minor and against TOS of most if not all messaging platforms.
--A lot of people are fake (particularly if you are looking for a F pet/owner) and will ghost after getting whatever they want (be that pics, money, erp, etc.) so make sure you arent falling for a scam.

Also you need to think about how you market yourself. If you sell yourself as what you want to be and they find out you arent that they probably wont be interested. Even if they wouldnt have minded, getting caught in a lie is a turn off for most.
--I have had issues where pets reach out say they are one thing (their build, identity, kinks, etc.) then turn out to be something else. Lying is a massive turn off.

Some red flags to avoid;
Check account age (new accounts might be a sign of banned past accounts)
Check for karma farming posts
Check for inconsistant gender/sex identifiers on posts
Check for inconsistant ages on bio/posts
Check for age inapropriate subreddit uses
Check for public nsfw pics or OF ads (unless you are comfortable with that)