* No photos of partying. Show some clear evidence that you have a shred of charisma and both men and women enjoy your company socially.
* Photos with other guys, or solo/selfie shots but never any photos with women. Even if it's with an ex, let me see your type. Attractive, masculine men usually have women desiring their presence, even if they aren't attracted to or interested in them. Even if it's just coworkers and other women you've never been intimately involved with. Really sad if a guy is pictured with his mom or sister(s) and no other women.
* Too little bio. Have some balls to be even a little vulnerable and open up a little without having to be prompted, prodded, and interviewed. If you're that closed off it means you're fearful, it can be spotted a mile away like deer in the headlights.
* Stuck on trivial identity cliches like religion and politics.
* Receding hairline (wearing hats in all your photos is a dead giveaway)
* No kids (shows lack of drive and desirability, also a strong indicator of avoidance of responsibility and commitment, or maybe that you're just broke)
* Has failed to get promoted routinely at work (further evidence of lack of drive, also inability to network to support ambition)
* Never married before the age of 30 is a monstrous red flag. Major indication of inability to commit and be an accountable partner (see above re: promotion) or just basic desirability to the opposite sex. Or both. Everyone is allowed to make mistakes in life, if you're petrified with fear about risk then odds favor that you'll be in the same rut for the next 40 years. And you'll just get more bitter and angry about it as time goes on and blame anything and everything except the one who's most responsible for your predicament, yourself.
Ciao!