Civil Wars highest score on IMDB was 8.2. It has since deflated to a 7.8
Right now Infinity War is sitting on a 9.2. I do think from what I am seeing the general audience is liking this a lot more than Civil War. My circle of friends reactions also agree with this. Scores in other countries own rating sites are also very high. I think legs could be pretty decent here despite the obvious frontloading potential.
Speaking for myself I have seen this movie twice already and plan to see a third time in cinemas. I never rewatched Civil War.