We stop the acquisitions. We work out ways to foster innovation and protect patents only in the short term.
We need more than a couple phone manufacturers, we need more than a couple of food producers. All of these monolith mega corporations keep smaller upstarts from coming up and competing.
Unfortunately some things will IMO always remain a natural monopoly. For example good luck trying to convince developers to write their apps for all those different operating systems.
And it’s hard for anyone to say no to multi-millions that will change your family’s life by selling when it’s not even 1% of the corporations profit. Can’t blame them for selling out really. I’d do the same thing and so would you.