Centralized regulation is not the only way to fight against monopoly, and more likely than not, it results in even more monopoly.
If you believe that there are enough non-corrupt, wise humans, you can stop the monopoly by just saying NO, NO to buy it's products and NO to work for it. No regulation required.
If you believe that there are too few non-corrupt, wise humans, then the government, and politicians also are corrupt. In that case centralized regulation will be used, to strengthen the monopoly.
Good humans create good times on earth.
Bad humans create bad times.
Regulation doesn't make bad humans good.
Wanna create a better earth? Work on yourself, unless you believe that you can change others 😅.