Power over others is not intrinsically bad. It is an utter fact of nature. In some sense having power over others is neutral.
What is also true is there are those who are weak.
And everyone will have some little power at least, and some amount of weakness.
While Marx thinks it is only used to oppress, that is just what he would do with it. I’d say for every person there is an amount of power they can wield for good, and past that they will use it to oppress.
The most wicked can’t even use their smallest bits of power for good. The best of us at some point would start to use our power to oppress.
There is no neutral ground though, you will use your power (be it physical, emotional, sociological, spiritual), to oppress the weak, or to lift them up.
Because in order to have power in one area (e.g. you’re highly educated, speak well, or wealthy), there is someone else who must be weak (uneducated, stammers, or poor).
To say power is intrinsically bad, is to say being weak is intrinsically bad, because being weak means someone else has power over you. “blessed are the meek” is true, but that is because someone powerful took the side of the weak, and defends them.
The problem today is we have a ruling aristocracy, and they’re not noble and good, but oppressive and evil.