[Autumn]

Personally I think that Cursed should be a downside that is not quite as severe with a marginally worth it upside, and I think "Doomed" suffixes should be much more gimmicky and severe, for example:

Rustic (Doomed):

-Weapon durability is reduced to 4 max, can only be increased by Upgrades. (Reflective of live currently)
-Weapon durability is decreased by 1 whenever a skill or spell is used by this weapon (Can only occur once per attack)
-Weapon cannot be repaired by any source except for Blacksmiths (Repair costs are increased by 5x)
-Weapon gains Brittle tag (+30% Main stat scaling)

There you go, you have a funny meme stick that is assured to break after 9 attacks, I'm sure there is meme potential here without making it quite too good, you might get weapon swap shenanigans but in the pursuit of 'for fun' I'd still say its a pretty good gimmick.

This is what I think 'doomed' should be like, gameplay altering effects that cause you to interact with your weapon or even piece of armor differently.

Perhaps there could be other gimmicks like a global curse that causes you to be unable to unequip a gear piece when put on until it is purified by a purging flame.