>>55962/pol/ is one of the most popular boards on the site (actually, it may be THE most popular) and as such brings in the most ad revenue. It'll never get deleted. Every board has at least a little bit of /pol/ culture in it (some more than others).
If seeing /pol/ memes and culture really stresses you out that much, why not just hide the incriminating posts and don't visit the board? Or, and here's a really crazy idea, why not just go to another website or do something productive?