M.int

Maliketh was pretty easy for me, but everyone struggles at different points.

If your still interested there is an item in Farum Azula (same place as Maliketh), that helps with the fight: Blasphemous Claw.
Maliketh has also pretty low Stance; heavy attacks and/or weapon arts can easily stance break him for a critical attack.

Or you could cheese him with Moghwyn‘s Sacred Spear and maybe the Mimic Tear, but that is probably overkill.

The descent of the Moon Presence in Bloodborne is still one of my favorite intros ever.

Might I ask for which boss this applied to you? I only had this for optional bosses for which I was underleveled and never for required bosses.

I enjoyed getting the shit beaten out of me when fighting the Black Gargoyle in Caelid. I never struggled like that with the required bosses, except a bit for the final boss, which I enjoyed.