If you can avoid a company, the fact that there is an acceptable alternative itself says that the market is not monopolized and so there is less chance of abuse.
In the markets where abuse is possible there are often monopolies, or there is illusion of choice like a (colluding or copycatting)duopoly or one where all the "competing" brands being owned by the same parent conglomerate etc.
It is very difficult to participate in the modern economy/world while avoiding certain companies. It might be possible but there are both social and economical costs involved that majority cannot afford.
Avoiding a company doesn't necessarily mean there's an acceptable alternative. I could use no social media and my life wouldn't be much worse or burdensome.
There's very little I can do to prevent the government from doing what it's doing by myself.