There’s a flaw with the sequels you picked: none of the first 4 were direct sequels to movies that were outright hated. Look back at the reviews for say AOU or TDW, they’re middling at worst. Nothing on the visceral “screw this movie” level of the first SS did, which is harder to win back folks from. People can be forgiving to a point if say a part 1 was liked for example like Avengers or Thor. It’s like if we ever get Wonder Woman 3, people theoretically would forgive that limpwrist sequel because they liked the first one.
As for BVS, you do have a point.