> Most of the incels discussion gives vibe of people who are completely socially isolated - not even really having friends or other regular social group which I would see as prerequisite to girlfriend.
You've stumbled on a circular dependency, but your proposed solution is the equivalent of "just fix it". (The joke in social-anxiety support circles is that all advice boils down to "just be yourself", which turns out to be... unwise.)
What makes these men creepy? Is their behavior innate, or acquired in response to other stimuli? If so, from whom? What have they gone through?
I have a quibble with the word creepy, similar to the word toxic: there are people who give off creepy vibes, there are people with toxic behaviors, but the words are used in place of more specific, clearer adjectives.
Card-carrying incels do exist, but the whole debate overvalues their political/ideological platform, completely ignoring men who go through loneliness, mental health issues, alienation and cultural disconnect but haven't made it into a political meme. Men and women experience all these problems, but they may experience it in different ways. When the subject of incels enters the conversation, everything is reduced to Elliot Rodgers.