You can't "buy" elections.
I'm not going to talk about the point that even some Democrats are making, that the Harris campaign was a massive scam that was more focused at throwing money at prominent Democrats than it was focused on winning, yet.
Still, this is further proof that you can't "buy" elections. The Clinton campaign spent orders of magnitude more money than the Trump campaign in 2016, and still lost.
There has never been any real evidence that the campaign with more money is going to win.
Of course, there's a floor. There is such a thing as having too little money to make people aware of your existence and what you're all about.
Once you have enough money to make people aware of you, and what you're all about, you've got a fighting chance.
Eventually, these big money campaigns hit diminishing marginal returns. Especially in presidential election years, the big budget campaigns will all get the candidates' faces and pet issues out there so much that it becomes boring, repetitive, and annoying.
The PAC money spent supporting a candidate outside of the actual campaign just adds to the diminished marginal returns.
The Citizens United decision wasn't just morally and legally right. We've seen time and time again that candidates can try to buy elections; but, they often fail. At the very least, one has to admit that there's insufficient evidence that any election between the two major parties has been swung by dollars spent.