I do both judo and BJJ, and I've concluded that some people are just ungrippable lol. Ridiculously fast + painfully efficient at breaking grips and counterattacking. Especially the judo-only guys when standing.

Once I know the other person is good at the gripfight in a certain position, I immediately let go and try to counterattack from another angle.

It's the only reliable way I've found to save my fingers lol