[AnimalMuppet]

Fire him now, before he creates the minefield in your codebase.

I mean, try to fix him first. But if he refuses to be fixed, fire him. He'll be toxic to the codebase, and he'll be toxic to the culture.

[brangalinafoeva]

True dat. He could easily become toxic. Give him a chance, but if he's the type that rejects reason (they are around), just let him go for damage limitation.