Now companies package all sorts of random crap, often make it impossible to remove or in many cases even disable, prevent users from getting apps except from their own walled in app-stores (where they take a huge cut of revenue), phone home endlessly for opaque purposes, forcibly impose updates which regularly reset user preferences to the benefit of companies, artificially promote their products in every single way (such as by being the automatically selected 'default' selection in every aspect of a system, knowing full well that changing the default is too onerous for the average user), and much much more.
The problem is not a lack of regulations or rules, but a lack of enforcement. As soon as all of these big tech companies started "lobbying" politicians, let alone becoming deeply intertwined with our intelligence agencies [2], it's like any concern whatsoever about antitrust just disappeared, or at least set to a practically unreachable level of villainy. All the rules in the world don't matter if they're simply not enforced for certain companies.
[1] - https://en.wikipedia.org/wiki/United_States_v._Microsoft_Cor....