What...by being successful?
They have less than 25% smartphone marketshare. What monopoly do they have?
That's why the regulation targets "gatekeepers" with revenue in the billions and at least 45Million European users.
The EU decided that this is large enough to be limited in what they can do.
Congrats, you won, now let somebody else play the game and become a boring public utility. And by the way, your research lab is now a public university. And the taxes is what government does, not you.
Because the role of the government (in theory) is to use these taxes for public utility services and projects. Companies only care about their owners and shareholders, a very small subset of the population. If you're not contributing to society, but just profiteering, you should retire. Especially if your position lead you to have a say to what succeed or not in the economy.