The original topic has gone off track now (in typical Apex forum fashion), but imo the absolute worst legend has to be Bangalore.
Her tactical is useful for your team, but also VERY useful for enemies if they have a recon legend or digi-threat. The smoke itself is also inconsistent, on multiple occasions I've clearly seen an enemy's silhouette in smoke, but they can't see out of it.
Her ult is easy to avoid, and the shell shock effect can screw over her teammates.
She portrays herself as being a hard*** soldier, yet when bullets start wizzing past her she turns on lil b mode so she can run away faster.
The worst thing about her though, is her stale personality and dense voice lines.
"ReAl MeN uSe IrOn SiGhTs? I uSe HeAvY aRtIlLeRy." So by that logic you're at the real bottom of the "Real man" scale?
"DoN't BrInG a PiStOl tO aN aRtIlLeRy FiGhT." Literally a P2020 would beat you against your "artillery"!
"yOu CaN't DoDgE hEaVy ArTiLlErY. yOu KnOw ThAt RiGhT?" I don't have to when a pebble can protect me from your "rolling thunder".
"fIrSt BlOoD. tAsTeS lIkE vIcToRy." That.. doesn't even remotely make sense, the match has just started how can you "taste" victory?
I could go on...