The 1990s- Quest 64. Such awful gameplay. I agree with Flynn with Persona One being bad too.

The 2000s- Star Ocean Till The End Of Time. Bad gameplay, bad characters, bad voice acting, bad story.

2010- Today- Eternal Sonata and Final Fantasy XIII. Eternal was silly, and FF XIII had no basic towns, was on rails linear, and had a messy storyline and an obnoxious main cast. I prefer more linear games than open world, but FF XIII's linearity was just..... insane. I don't think I'm jumping on any FF Fandom Bandwagons here by voting FF XIII here- otherwise, I wouldn't admit that I'm a massive fan of FF II- which is considered to be the worst of the series.