Brokers with Intl funds to sell claim foreign stocks will hold up when Wall St crashes. Name funds that dont crash right along with the U.S ?

Every chart I look at, including foreign ETFs and mutual funds, generally track the U.S. S&P. Some can keep up with the S&P but most underperform it, especially if they pay a dividend. Either way, the general shape of their trend line matches the U.S., and if you look at the crash of 2008-09 or 2020, if the U.S. crashes, everybody crashes. Should I just forget the snake oil salesman trying to get me to pay a high upfront load to get in on his foreign stocks, or can you name a foreign fund that held up when the U.S. market tanked, like in 2020? (clearly outperforming). It's like finding a needle in a haystack when it's not clear that the needle even exists. I use fund screeners and most funds show such similar performance, they could get rid of most of them and they wouldn't be missed. Everybody and their little brother wants to start a fund just to sell it to 'clients' and collect fees. Most can't even match the S&P 500 index.