I'm not claiming it's an infallible system and that no single cent of my money goes to Russia. I just do what's within my powers based on the information I have.

It is maybe unconventional in a public discourse but I believe that it is completely fine for an individual human to "discriminate" anything multiple orders of magnitude more powerful, richer and more unaccountable to him/her than a human. For example - a billionaire, a corporation, a country, a block, an alliance, a military or mercenary unit and so on. Just because there are some other baddies around it is totally okay for an individual to boycott one of several selected baddies. Sure, it is a "discrimination" and it's fine. The power imbalance dictates that it is both ethical and logical thing to do.

It is especially logical to "discriminate" corporations which are not corrupt monopolies entwined with corrupt governments. Boycotting FAANG corpos is as pointless as it is impossible. The only reaction one may get from those is dead silence. Boycotting Kagi and publicly shaming them, may make them wake up and correct their misguided ways. For example, after years of nagging and shaming, DuckDuckGo has cut ties with Ruzzians. So that sometimes does work.

That is a tough position, I don't have a definitive answer. Perhaps you could look at supporting non-US and non-Russian companies building their own search indexes? Not sure what the state of Ecosia and Qwant's European Search Perspective is these days, but that's an option.

Murder and jaywalking.

I try to avoid US companies as well when possible, I just avoid Russian ones even more.