No quick way. There are too many regulations which are enforced badly and abused to actually support that “big fish”. Make them fewer and make the punishment swift and unavoidable and hard. And split a few of the worst offenders into parts each in one specific area - Apple, Google, Microsoft, Meta are all good candidates.
You forgot to say that regulatory apparatus should have much fewer points of failure. That is, it should be made stronger and more efficient, but it should be radically contracted. It’s bigger than needs be.
By points of failure I mean opportunities for strong entities to make regulations work for monopolies\oligopolies.