If you know Swedish you'll easily hear how incredibly sucky these guys are... I think you can hear it clearly otherwise too.
YouTube - Håkan Hellström "Ramlar" YouTube - Basshunter - Vi sitter här i venten och spelar YouTube - Rosa Helikopter - Peaches t
There's plenty more where that came from.
But people like this crap, I don't know why...
As for rap, thrash etc... They are genres, there's good and bad music in all genres. You can't say all rap is bad based on your experiences, that's like being musically racist.