how to exclude categoris from archives?

Hi, I’m trying to exclude certain categories from my blog, is this correct?

function myFilter($query) {
	if ($query->is_home || $query->is_feed || $query->is_archive) {
		$query->set('cat','-210');
	}

return $query;
}

add_filter('pre_get_posts','myFilter');

but it still shows up under categories, any help with that?

also in archives, it does exclude post, but still displays +1 extra post that doesn’t exist inside, how to fix that?