Maniac, go here to adjust your monitor settings:
http://epaperpress.com/monitorcal/Most of what you're griping about isn't even an issue. You can't substitute skins on your end. You don't get any benefit from flying with skins turned off. It is purely an icing-on-the-cake eye candy.
I love flying with enemy skins on, so that I can see if I'm up against a red Me163, or a black Bf110C, or to tell if my P-51 in my gunsights is green or silver, or just for general coolness factor.
I can run them without any performance issues. I enjoy that. It hasn't always been that way, though. When you need the extra performance, you'll be glad it's an option you can turn off.
Otherwise, look into your monitor settings. I once had an older CRT that was MILES off of normal, but I didn't know any better. Not until I replaced it did I know how far gone it was. Check out the link in the second line of this post. It really will help. Set up your monitor properly and see if that helps.