In Elder Scrolls Online I find that Molag Bal, who is by all means the main antagonist, seems sort of (sorry Zenimax) dull and generically evil.
He is essentially pulling the same stunt that Mehrunes Dagon (daedric Prince of Destruction) tried in TES4: Oblivion, of invading Tamriel through a bunch of portals. Now of course; Molag Bal is trying to pull Tamriel into Coldharbour, which in a sense makes him the opposite of Dagon, but whatever.
He just seems generically evil with stuff like "the skins of those you love will fly as my banners" etc. etc.
But you look at the former Elder Scrolls games (read: ESO's source material) Molag Ball pulled some sinisher **** - like real micro-management sadistic stuff that's only barely referenced in ESO.
SPOILERS BELOW
In the Vampire quest of ESO you meet Lamae Bal, the Blood Matron, who comments that Molag Bal "ravaged her" - more accurately he r@ped her, and turned her into the first vampire. Lamae then proceeded to go berserk and r@ped the nedic tribesmen who had found her, turning them into vampires as well, starting a curse that would haunt Tamriel forever.
From Opusculus Lamae Bal (in-game Book)
"Savage and loveless, Bal profaned her body, and her screams became the Shrieking Winds, which still haunt certain winding fjords of Skyrim. Shedding a lone droplet of blood on her brow, Bal left Nirn, having sown his wrath."...
..."That night, Lamae rose from her funeral pyre, and set upon the coven, still aflame. She ripped the throats of the women, ate the eyes of the children, and *** their men as cruelly as Bal had ravished her."
In TES4: Oblivion the player could quest for Molag Bal's favor - you would continually assault and offend a local pacifist, a former hero who tragically lost his wife, and make him murder you (Molag Bal would return the player from the dead, once he had gotten the man to commit murder).
In TES5: Skyrim Molag Bal had the player beat a priest of Boethiah (daedric prince of plots and enemy of Molag Bal) to death - several times - to make him finally surrender his soul to Molag Bal.
One of Molag Bal's titles is actually "the king of r@pe" - and I do kind of understand why ZOS downplayed that, as a lot of people would take offense. But what I liked about TES was that they always seemed to take stuff a step further... In Morrowind you could actually meet a dremora that vowed to murder you and then "r@pe your corpse". Now that's the sort of twisted you don't get from "I will pull Tamriel into Coldharbour and make people my slaves, etc. etc."
P.S. I have to spell it as "r@pe" because the word is actually censored, which seems odd given that it is one of the canon-titles of the main antagonist.
I think it is central to ESO's well-being to critique the developers when they change the game (or fail to change something).
But the negativity can be exhausting, so I vow to post 50/50 negativity and appreciation.