That was the one, yeah. No wonder a lot of fans, and even some in-universe characters like Moon Knight, were equating Civil War to a marital spat between Steve and Tony. In fact, one particular scene in one of the tie-ins where Steve and Tony had one last argument sometime before the final battle had Steve accusing Tony of manipulating Peter (Parker)'s need for a father figure to influence Peter into siding with him in a way that sounded very familiar to just about anyone who ever had to deal with divorcing parents. As for MCU Bucky being a fusion of Ultimate Bucky and Arnie Roth from Steve's backstory in the 616 comics, that does make a lot of sense in retrospect.
Thanks for the information. Very enlightening, but very disturbingly so.