Over here you have a hard limit on how much money private citizens and corpos can contribute, no donation can be anonymous. You can't even sell merch or collect cash donations if you're a political party.
But a more interesting point you made is the perception of protests. You picture them as... well, US protests. You get a cute little march with people giving cops flowers and then it escalates to "riot", which is already on the other end of the going straight to violence spectrum I find so weird.
The escalation point of a protest in my mind is a strike (which, weirdly, your relatively rich media people just successfully and very publicly did, and are still doing). The next step after that is a general strike.
Sure, I hear that there is likely not enough public support for that in the US. You seem to see that as part of the system that prevents nonviolent action from being useful, but surely the lack of support discards the option of violent action as well, right? When you talk violent or revolutionary acts you also need public support. If people aren't willing to put real pressure in other ways you're also not going to round up the capitalists using sticks and handguns any time soon.
I'm not surprised at the sense of powerlessness, I'm surprised by how the notion that violence solves the powerlessness is so prevalent.