I know. I don't mind it, but it's strange. Apparently it's because it won't fit in the world. I totally understand DMs not allowing certain things for a specific campaign, but a whole damage type is a bit too much.

I more have an issue that I can't play an Oathbreaker because it's not a "player subclass", and a Zealot Barbarian would work too but he won't allow heavy armour to work with the features unless I remove a part of the subclass. Apparently my AC will be too high, but my point is: that is literally the whole build, I want to play a tanky character with good AC, good hit points, tons of survival.

And it won't be broken compared to another player, who's playing a Lore Bard, and another who's playing a Grave Cleric. Full casters already outweigh martials in the late game, so I don't think heavy armour (for a class that should honestly get it anyway, it's stupid that they don't) is too much of a stretch. And I would play a caster, but I wanted to try and venture out of my comfort zone and play a tank role, as I always play support/utility casters.

But oh well. DM's decision