That's because Civil War is a miles better film... Anyway, you get my point.
So you're saying 4x more people voted it more than 8 than users voting it less than 3 (where did you even get that from)? Ok, so what? I'd give SS a 6 myself, BvS a 7...
I went to see these films because I like good action films and I like the characters.
But why go? Were you hoping these films would be different? Don't we know what to expect at this point?
I don't know about you but if I'm not sure about a film in the cinema then I watch something else, wait for reviews or a solid recommendation. Save yourself the disappointment next time...
And on your edit, maybe I wasn't clear, but for all those people rushing to vote up their favorite movie there are those rushing to vote it down... It is what it is. It's not even a astute observation, it's how things are across any and all internet voting systems.