I think MoS had higher peaks too, Supes flying for the first time, Krypton, basically every time Zod was on-screen. It was a solid movie that suffered from three big problems:
1) Snyder is bad at directing likable, relatable characters so it's hard for the viewer to root for Superman.
2) The pacing really felt off-kilter, with way too many flashbacks.
3) It ended on a downbeat, with Superman bawling like a baby after killing a dude (yeah there's a little tacked-on scene after but most people won't remember it).