Help!!. a problem with self esteem..w?

women are more promiscuous these days, i feel like guys like me are being weeded out, im on the small side..example.. what would impress you more in a ual encounter, a guy with a 5in that was really good in bed, or a guy who was well endowed and really good in bed.....im scared, ...MY EX G/F WAS NOT VERY GOOD IN BED BUT SHE GOT THE JOB DONE...SHE LEFT ME BECAUSE I WAS SMALL...WTF?!?! I GUESE IM RANTING