Google has its own browser, its own search engine, and provides a somewhat easy method to access the majority of the Internet and does it well.

The problem isn't that it does it well, it's that it did it well and it doesn't anymore.

They dominate the market and can afford to make the search AI-inflated bullshit without any revenue losses.

Another part of the problem is the integration. Some google websites are rendered inoperable on Firefox, while others are made to have a worse experience.

A third part is giving its services preferential treatment onstead of having thekr algorithm be unbiased towards in-house services.

Edit:

Once upon a time the best browser game in town was Internet explorer. Similar stuff happened (actually even less blatant then Google). Microsoft basically controlled Web standards. The biggest sin they did was bundle IE with Windows, at least according to the US suit.