It wouldn't be an advantage. I hate to break it to you, but Mother Nature knows her shit. We've evolved the "negative" tendencies we have for very good reasons and most of them are still doing their job at improving your odds for reproduction.

I suspect that (seemingly) ugly tendencies like confirmation bias, stereotyping, vengeance, shame, etc. all increase your personal odds of reproduction. Likely at the expense of society, but it is what it is.

I can understand how complete social trust and lack of anxiety would be beneficial in a perfect world; alas, we do not live in one.