Plenty of incels could easily find girlfriends, the issue is these women they could land don't meet the standard they feel they deserve.
This, very much so. It isn't that the fat, plain or socially awkward women have rejected them, it's only that the beautiful, slim & "model" type women who they want have gone for someone else.
Well guess what? Women who are considered "below average" according to modern standards of beauty, femininity or social skills tend to be rejected by "above average" men. Doesn't turn us all into man hating violent people blaming society for unrealistic stereotypes and murdering good looking successful men. We just pick ourselves up and look around for someone who appreciates us for who we are as a person rather than on societal stereotypes, but many men don't seem to apply the same logic. You don't see very rich, powerful or famously good looking men with short, fat, plain or sour tempered women on their arm, they get their "pick" of the sweet beautiful women. Works both ways - if a woman is desirable enough to have her pick of men she can go for the one who can provide best for her or is the most attractive to her.
I was never particularly attracted to uber masculine "alpha males", violence isn't a turn on for me nor is entitlement. Give me a man who has a brain & uses it, is kind and considerate, is comfortable in their own skin, and without a chip on their shoulder because they think someone else has an advantage over them, and things like looks and physique don't really matter to me. If I was in the market for a partner, I would be very happy to meet someone who may be not particularly attractive, doesn't earn a fortune, and prefers gaming or watching history documentaries rather than playing sport all weekend then going out getting pissed.
Yes I can see a beautiful male body on the TV and admire it, or think "wouldn't kick THAT out of bed on a cold night", but that's just like window shopping at a really expensive shop you can't afford. I don't think "not fair, I deserve someone who looks like that" and blame it on society that this gorgeous looking 20 something won't look twice at a middle ages, plain fat woman.