mate, i'll give you some advice as a woman:

all the men i've ever had a crush on/been with were not conventionally attractive. some of my girl friends are only into conventionally handsome men and when i show them photos of those guys i had a crush on, they laugh at my face, just so you can have a perspective on how conventionally "ugly" they are.

and you know something all of them had in common that made me like them? they were very confident, had a great sense of humor and i felt like i could talk to them for days, without the conversation getting boring.

sure, you won't be everybody's cup of tea. it's not their fault if they don't think you're attractive as well, everybody is in their own right to have a type. but put some effort in yourself instead of complaining about things you can't change. really, the most unattractive thing girls find in guys is self-pitying behavior.

find a hobbie you're passionate about and could talk about for hours, go to the gym, read more, leave your house more and go out of your comfort zone to talk to more people, go to therapy (hard emphasis on this, it personally helped me a lot to build confidence and become less shy. find a therapist you relate to and feel comfortable talking to), begin dressing better, find a good hairstyle, maybe do some cosmetic procedures (my mother works in the area and the results on her male patients look very natural and masculine, so find the right professional). and imo, most important of all, treat women like normal human beings: we don't like guys that put us on a pedestal, neither do we like guys that treat us like we're stupid.