Objectively speaking, I'm ugly. This isn't a matter of low confidence, it's just fact.
I've got a minor oral defect that means my jaw is out of line giving me a serious double chin despite being fairly slim, and my teeth are wonky as fuck (like really really wonky with a massive overbite, this probably could have been rectified to some degree when I was a child but my parents don't believe in dentists
and now it's too late for me to get NHS orthodontics). My nose is huge, which on top of the jaw/teeth issues makes my face look fairly misshapen. Plus I'm very shortsighted so wear mega thick glasses (can't afford slim lenses!).
My figure is ok (starting to wobble a bit with age but it's not terrible), but my fanjo area is not a pretty sight after a traumatic birth - it functions ok so not a massive deal, I know it could be a lot worse, but it doesn't help with the whole package.
My oral defect also means I can't snog or give a decent blow job, so basically I'm fucked 
And as I approach 40, and the father of my DC has left me for someone younger and prettier, it just gets me down. For years I've made myself stand out in an unconventional way (piercings, unconventional hair and clothing etc) but as I get older I just feel like that's getting to look really jarring on someone pushing 40. I don't have the benefits of youth or a perfect figure anymore which were basically my only decent points lookswise!
I always thought it didn't matter because I had found someone who would love me forever anyway but clearly that was a delusion, and I can't see anyone else ever being interested now 