I'm finding Resident Evil 5 really difficult?

Stay in that hut where you can push the shelf to the door. Not the first one, the one that is next to that bus thing. There is a machine gun in that area too if you want it. It is next to that gate that is locked. Two player is easier. If you don't know how to get two player, start a game then have a second player press start. Try to melee the executioner once. Don't hit a second time or he'll swing his axe around. Don't feel bad, it took me about a month to beat the game. There are way harder levels than that, but you'll have better guns.