First off, that's not actually true. The average woman spends a lot of time and puts in a lot of effort before going out on a date or to an event where they are hoping to meet someone. And if the guy they are interested in doesn't feel the same, they don't typically go on rants/demands about how he really ought to like her "as is." Saying "I'm nice, you should like me" is not something women ever say, but it's a common refrain for some men - who seemingly don't get it that "nice" is a baseline, it's a bare minimum. It's not an attractive feature all on it's own and it doesn't entitle you to anything, because nobody is entitled to finding a partner.

This is not a conversation about hook-ups, it's about Gareth's contention that all men who are self-confident are assholes, and so therefore women liking that about a man means she's attracted to toxic traits. But healthy self-confidence is not problematic in the least and he only says that because it's not something that he's good at conveying to women and he wants an excuse to blame them for that.