well, the Soros part gets picked up. not that that diminishes anything.
I just dropped your meme into tineye.com reverse image search. Your foundation image showed up as found.
I think your meme would be "camoflaged" amongst the other pics of him that use the same foundation image.
I don't know if there is a simpler way, short of making unique images every time. However, I doubt the majority of memes would get sniffed out unless they start getting super wide circulation.