lol. I noticed it depends on what I search for. I typically search for programming issues. Google tends to have the correct Stack Overflow answer up at the top. But I agree a bunch of ads otherwise.

uBlock plus some filters that remove the ads. Someone also made one that filters out the stackoverflow copy sites.

it depends how and what you are searching for, I've seen some "spam" with stackoverflow clonse, but that seems to be gone now mostly. I also think that you are exaggerating a lot, otherwise citation needed.