So far I don't find MCU Zemo as sympathetic as villains like Magneto and MCU Killmonger. Bad things happened to those characters that lead to them taking an extremist outlook.
It is questionable how good of a person Zemo was before his families death since he was the leader of an elite
Sokovian paramilitary death squad. We also know Sokovia wasn't exactly a stable nation pre-Ultron also either.
Comic Helmut Zemo was mostly driven by vengeance towards Captain America for his father's death until the nineties.