>What other internet browser could I use in the 1990s besides IE?
Netscape? Opera? Lynx? All of which predate IE.
>What other phone can I use besides a Google or Apple phone?
A dumb one. Or install something like LineageOS. And if your complaint is that they're not as nice, well, they're not required to be. Philosophical positions and moral boundaries have a price, and convenience is a small one to pay.
>How do I avoid giving Nestle or Unilever money? By avoiding a massive list of thousands of brands?
Yes. That's exactly what you do. With the exception of certain pharmaceuticals, the vast majority of the stuff they sell is not necessary. If you don't want to support billionaires, don't be suckered into the consumerist trap. It's not hard to live with, and want, less stuff.
Honestly, the sibling comment about billionaires capturing critical infrastructure and monopolizing it is a much better argument than this. But you're not even trying to look at the issue from my perspective. If you object to the way your government is spending its money, as many citizens have done over the past twenty years, what can you actually do about it? The consequences of withholding your money from the tax man is much more severe than doing so from Bill Gates or Charles Koch.
How should I stop using Comcast for my Internet?
What other internet browser could I use in the 1990s besides IE on an ActiveX page?
What other phone can I use besides a Google or Apple phone?
How do I avoid giving Nestle or Unilever money? By avoiding a massive list of thousands of brands?
These are just a few examples of the negatives of capitalist consolidation.