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You used an operative word there, "never".
I don't know your relationship with your dad, your socioeconomic status, your age, your ability to change people's minds. Etc. But if you really think that the answer is "never", then you have a decision to make. Whether your dad is worth maintaining a relationship with or not. Would you still spend time with your dad if you never talked politics again?
If you're young, your dad might not have a kind of respect for your ideas compared to if you were older. That's just how it is with parents, that will come with time. Maybe you can convince him of these ideas in 10 years, when you're older, he's older, and the world has gone even more to shit, And maybe he sees the systemic problems behind it.
If you're wealthy, your dad probably has the same mentality that most people who are wealthy have, which is that they deserve everything that they have, and fuck everybody else. I don't really know how to change those people's minds.
If you guys are not well off, then you can try to leverage regular socioeconomic talking points. Getting him to understand that the system is rigged and that kind of stuff.
It's important to spend our time in places that matter the most. Maybe your dad will never understand. Accept it and spend your time on other people you might know.