>>21073740King's Shield has enough counterplay. I don't give a shit about all these faggots crying because they can't deal with it. Protect however gives you a free turn to stall every other turn. There aren't enough things you can do against Protect because it also blocks a ton of status moves.
The only thing you can do is use hazards, use substitute, tailwind or set up. Feint should be stronger AND double in damage when it breaks Protect.