I had two problems with CW - The start and the finish. (Everything that went on in between I was happy with)
Firstly, the start. What I am not convinced of is the trigger incident was not strong enough. You look at the start of CW and Stamford happens every day of the week in the Marvel universe. That it was a televised attack on villains may have more to do with the negative reaction, but it could be explained away as a sting going wrong. Cops and FBI do it all the time.
The start of CW needed to be a straw that broke the camels back. An incident that built on multiple incidents that stepped over a final line. Latveria taken by the FF, secret War, avengers imploding in AD, Unauthorised New Avengers, Philadelphia bombing by winter Soldier, Hulk sent to Sakaar, Iron Man taken over by a boy. It needed this sort of warning by the government that any more foul ups and you are going to be brought into line with the SHRA. But no warnings were given.
The second problem I had with CW was the ending, in the fight between Tony at Cap. I think Cap realised he was killing a person (Stark) and not achieving a change to the SHRA, but making it worse. The Emergency workers restraining Cap, did that because they never saw Cap in a position where he was going to kill a hero and a friend before. That was what had to be stopped. It was a very poignant moment in CW. Yet the story didn't convey that aspect of the incident.
The reason I'm looking at CW again is it is the forerunner to the breaking of Space-Time due to the Age of Ultron. Prior to CW, the super hero MU was in a condition of continuous super hero fights that had no real consequences, because they were just rehashed stories had been going on from the start of the 1960's. The Civil War was a turning point in the status of the super heroes. This incident started a downward trend to both the super humans in particular, and Marvel Universe in general. Now we are at a state where the MU itself is breaking up and we don't know where it will end up. The super humans were the cause of this mess as well, because it was one of them that created Ultron, and nothing was done to stop Ultron in all these years he existed, until the calamity that now befalls the MU.