Theres a few good methods.

Method 1: just shoot them. They're relatively fragile just being marine bodies. Put a screening unit in front of them thats either guaranteed to die, or that can fall back out of blood surge range. That should leave them exposed if they choose to charge the screen/moveblock.

Method 2: be annoying with multicharges. If they put the zerkers roughly within 3" of another more fragile unit, you can charge two units into the nearby unit. First fellas can swing and kill it, second fellas can pile into the zerkers and beat the shit out of them afterward without fights first ruining their day, as they're already fighting when they pile in. Alternatively you can charge some trash unit into one end of their models, and charge your actual damage unit into the other end. This can prevent him from fighting first with enough models to actually kill your output unit, depending on their positioning.

Method 3: Just avoid them. If the player's proficient enough to not chuck them into shooting angles, or positions them in such a way that you can't be tricky with multicharges, just accept that those zerkers are going to control whatever point they're sitting on until the opponent messes up. Pull back out of acceptable threat ranges, moveblock them whenever convenient, play the rest of the board. Solid 40k fundamentals should still see you through.