I don't want to speak on behalf of John Gonzalez (who wrote Caesar), but while you are not necessarily supposed to DISlike Caesar, it was not our intention to make Caesar someone who is easy to like, nor his autocratic rule something that you react to by saying, "Oh, well it's totally justified."
If a person says, "I don't like Caesar," I wonder if that person doesn't like Caesar as a character or doesn't like Caesar as person. If you don't like Caesar as a person, that's not surprising. He's pretty unlikable for a variety of reasons. He is a domineering tyrant who runs things in a way where he is effectively unchallenged, and it produces a narrow vision in him. No one in the Legion *debates* Caesar, and he has ruled through brutality for so long that it's now just the way things work in Legion territory. Ultimately, Caesar is an educated tyrant living in an echo chamber of his own creation. Despite having a long-term vision for the future, he is quite short-sighted. If you were expecting Caesar to be grey and found him to be black, I'd argue that he's still grey, but he's intentionally a very dark grey. Tamerlane and Charles Taylor also had reasons for doing the things they did, but it doesn't make the things they did any less terrible.
On a related note, I've written before that I believe the gender roles in the Legion were not effectively communicated in the game. Through Legionaries, it is portrayed as misogyny, which was never the rationale I had in mind for Caesar's motivations. Caesar wanted women to stay out of battle because he wanted to produce as many Legionaries as possible as quickly as possible. It wasn't about the fighting (or other) capabilities of women, but the simple fact that women are the only ones who can bear children, so he wanted them doing that as much as possible. Unfortunately, I don't believe Caesar ever says anything about this directly, so the player is left with the very misogynistic statements of various Legionaries. It's still reprehensible, but for a different reason.