I think the main issue with imposter syndrome is everyone realises they suck but don't realise so does everyone else. If you look at the majority of private code bases in the world, they'll look like crap. Even the stuff getting leaked out of the major companies look like crap. Even some of the offical open source stuff coming out of the major companies get pulled apart for valid reason.

Everyone feels like they suck at programming, because they do, it's ok, everyone else sucks too.