Glimmers entire reformation, making her a bland character with no actual personality that was forced into the show and took most of Twilights limelight,The new writing staff of unfamous people since all the good writers who wrote the best episodes of mlp has left for Disney,Rainbow Dashes wonderbolt episode, which should have been one of the most epic episodes that everyone loved, potentially a 2-parter, ruined to the point that it made Rainbow Dash Fans stop having her as best pony and came out as one of the worst episodes of all time. (I am a Dash best pony person, But I didn't watch this episode to remember her as how great she was, before the new inexperienced writers took over).To name 3 Reasons/opinions. xD I mean, you did ask