I'm not an incel but I do lurk here occasionally because I lost my virginity pretty late (22) and had a lot of the same thoughts and feelings as the guys here for those first 22 years of my life. Most of what I see here is very accurate, as I see it the following observations are true:
Physical attractiveness / good looks are the single most important thing that young (<30) girls look for in a relationship.
After looks its about how much of a bad boy he is. Drug dealers, violent criminals and other degenerates are at the top of the list, with well adjusted men studying for their STEM degree at the bottom.
Girls will punish you for treating them with dignity and respect, and will reward you for treating them like a used-up fuck toy who isn't worth your time.
The only times I ever have had success with women it's because I followed these three rules above. I no longer pursue women because it causes me a lot of distress to deliberately hurt someone that I truly care about, to the point that it ruins all enjoyment of the relationship for me.