As a counterpoint, I'm pretty short, make nowhere near 300k and work in software. I'm not what one would call "traditionally masculine" or a "chad". And yet, I haven't had problems finding people to get involved with.
In general, I think finding a relationship requires thoughtful effort but isn't particularly difficult. If relationships are seemingly impossible to find (e.g. for many incels), I think they either aren't putting enough thoughtful effort in (e.g. not realizing how some of their views/habits/mannerisms are off-putting to their target audience) or are looking in the wrong places (e.g. dating apps where the odds are too stacked against them).
In general, I think finding a relationship requires thoughtful effort but isn't particularly difficult. If relationships are seemingly impossible to find (e.g. for many incels), I think they either aren't putting enough thoughtful effort in (e.g. not realizing how some of their views/habits/mannerisms are off-putting to their target audience) or are looking in the wrong places (e.g. dating apps where the odds are too stacked against them).