Which long-running, major series is the worst in gaming? (and why)

[Leynos]

There are popular series that are mid that keep going so almost but not every AAA franchise. Actual worst? Like complete trash. Probably have to search smaller scale like the Tohou games. Neptunia games are trash. Then again anything Compile Heart is.  Series is dead now but at one point it felt like Army Men games from 3D0 would never stop. They were terrible. There are also games just harmful like CoD. A lot of bullshit US propaganda and racism. The games as games are whatever, frozen burritos. Not amazing but get the job done. Real issue is the messaging.