How come attractive guys are nicer to me while "unattractive" guys aren't when trying to date?

I've been trying to put myself out there to date even make cold approaches and go on dates from online. With online dating I try to lower my standards maybe the guy is changing careers/doesn't know what he's doing - not making enough as me I make 3 figures and he's short and sometimes even bald. But those guys are so mean to me on dates, one even got up after 30 minutes and just left. But when I talk to guys I'm attracted to and approach IRL they are nice and receptive I get so weirded out I end conversations even if they act interested. Because to me it doesn't make sense why are they more receptive to me than the guys that are average Joe's or below that have behaved very mean on dates some even passive aggressively making remarks about my weight.

How do I from here?

How come attractive guys are nicer to me while "unattractive" guys aren't when trying to date?
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