How can I deal with a player that prioritizes combat over roleplay in a roleplay heavy campaign? They all knew what they were getting into and agreed during the session 0.
He tends to try and rush other players through roleplay and investigation and only focus on combat. He would interrupt another player while they were asking good questions to try and get to the point quicker. I can't really say it's part of his character because his roleplay for the character changes every week (inconsistent). There were a few occasions where he would 'Leroy Jenkins' during discussion (he would stop discussion and run into the dungeon alone).
This is counterproductive as the combat is often lethal and the investigation is crucial to lowering the difficulty. I'm worried that I will have to either make the combat easier or remove more roleplay to avoid player deaths or loss of interest. This would reduce the over all quality (and gimmick) of the campaign.
It's only 1 out of the 3 players that is like this, but he tends to pressure the others, and the other players brought this up to me.