I haven't rtwt, although I can see from the last few posts, it may have taken a turn ...
However, going from the initial post, OP i get where you're coming from. I have the loveliest male friend - in his 50s, unmarried, no kids who has been single forever. Unfortunately, he's no looker but what he lacks in attractiveness he more than makes up for in humour, wit and personality. For the first few years of our friendship, I couldn't for the life of me understand why he was the perpetual singleton - he pretty much has his shit together ( own home, car, ok career, close ties with his family yada yada) and in my eyes, ticks a lot of boxes with the added bonus of no baggage or sociopathic tendencies! He'd forever be bemoaning his lack of success with women, (apparently we only wanted male models or millionaires!) and despite me pointing out that simply wasn't true and if that were the case, 90% of the world would be bloody single - he still wouldn't believe it! I used to feel so so sorry for him; that essentially he was so lacking in confidence and self esteem, he truly believed no woman would ever want him. That he believed himself to be so unloveable and unattractive that his fate was sealed. I used to think this until very recently!!!
It's now become clear he has a very specific type - big boobs, long thick brunette hair, cushion lips, in her 30s, curvy without being fat, almost cartoonesque in appearance ( think Tanya in housewives of Cheshire) and this is the ONLY type he lusts after. He actually couldn't give a fig about their personality - be it selfish or unintelligent or unkind, he really doesn't care as long as they have " the look" and the reality is, this type wouldn't give him the time of day, so he's right in that regard!. It's so sad to see the truth reveal itself. I've wasted years trying to build up his confidence when in actual fact, he is shallow and superficial and WILL most likely forver remain alone. I see him in a whole new light nowadays; my sympathy has been thwarted and replaced by disgust mostly - that he desires a blow up doll not a real adult relationship!