GP claims there is healthy competition, eg ddg. Therefore I guess by your claim that monopoly blocks competition, there's no monopoly, unless you want to claim DDG actually sucks, which would be an unpopular stance to stake here on hn.
The claim could perhaps be rephrased as stating there is no (substantial) competition. For instance, Sailfish OS is technically a competitor to iOS/Android, but it is by no means one with any considerable market share.
