Look, this is a shitty thing, but what exactly is Biden supposed to do here?
He can't fire SCOTUS. If he issues an executive order to counter this it will get litigated. He can work with Congress to try to get a law written, but since we don't have both houses, that's not likely to happen.
He can issue an executive order and have it get litigated. You >just< said what he can do and then proceeded to argue he shouldn't bother even trying because it might not work.