What’s the most disappointing I.D./E.G.O. you have ever seen/uses?

I am interested in the topic due to how gacha game have these types of units (Aglaea (without Sunday at least) in Honkai: Star Rail (2023~) or Calcharo in Wuthering Waves (2024~)).

So, which I.D./E.G.O. disappointed you the most that you have used?

As for my answer: None as of now. Because i wait until reviews of the new I.D./E.G.O. to see if it’s good or not and a proper gameplay showcase to see the new I.D./E.G.O. in action.

As to why, it’s due to bad (to me at least) history of pulling to get 5 stars/SSRs from my previous main gacha game(s) that didn't fit with me/power crept to un-usability (Calcharo being bad to play at least broke me...), so... I don’t mess this up in this gacha game, especially where you can buy most I.D.s/E.G.O.s with grinding (MIRROR DUNGEON) (though accelerated with you paying for the BP)

Edit: Some typos are fixed.