I had the same issue, there were dozens of striped cucumber beetles on each of my squash plants (Not the western corn rootworm beetles, in pics I have seen the stripes look different). I heavily dusted the immature squash fruits and flowers with
DE and sprayed the leaves with neem oil. I went from seeing hundreds of the things to the very next day needing to look for a few minutes to find a single beetle. You have to keep up on it though since rain washes everything off and they will return but if you reapply after every heavy rain you can keep the beetles away almost 100%. Luckily they seem to have left the garden too, they didnt migrate to any of my other crops.
The ones I have must not have got the memo about amaranth being tasty, I stopped pulling the pigweed and lambs quarter out of the beds as weeds (In the amaranth family) and they ignored them and kept eating the squash, they didn't even bother to start eating them after I sprayed the squashes.