Okay, but (from Google) 5′ 5″ is closer to the U.S. average height for a man (5′ 9″), but is still at the 7.2 percentile. That means only 7.2% of American men are shorter (and 92.8% are taller).Jul 17, 2023"

So this is not a problem that nearly 93% of men are going to have to deal with.

If it bothers our imaginary guy so much in party situations, he could get lifts to make him an inch or so taller, put him closer to the average male height of 5'9".

He could work on not feeling so awkward and stand out-ish. Definitely consider that projecting that awkwardness is the bigger turn off than the height.

He could not rely on those sorts of social situations to meet someone and focus on ones that mitigate that awkwardness.

I understand that it's validly a challenging situation. But no one is helped when the issue is conflated, magnified and catastrophied by Influencers using it to make money off misogyny. Let's not fall into that pattern without being critical thinkers about it. A challenge does not doom you to loneliness. It's not hopeless.