Market dominance <> abuse of a dominant position
I have no insight into any company's practices. I do have personal experience of which company's products play nice with other companys' products. Being dominant in a market is not anti-competitive. Abusing that dominant position is the offence. Obviously companies that have failed to gain market share are free to use whatever legal means are at their disposal to do something about it.
I have no idea if the consumer benefits from all the dead weight costs of lobbying, advertising, astroturfing, litigation, patent protection and all the categories I've missed.
I understand that until recently Microsoft made more money from Android than Google did, it might still be true, because of patent royalties.
I do know it was Google that gave away the rights to its Motorola patent portfolio to protect Free and Open Source Software.
Despite being free in all senses of the word LibreOffice has failed to achieve much market share and often wonder why. People that don't use it tell me it is because it isn't good enough though I've often wondered "good enough for what?"