Is simply having a more popular brand inherently anti-competitive? No, having a very popular brand (>80% of market say), and then using that brand to kill comp

Is simply having a more popular brand inherently anti-competitive? No, having a very popular brand (>80% of market say), and then using that brand to kill competitors in another market is anti-competitive. Google are not a gate-keeper for consumers, but they are for many kinds of business who want to be found on the net - they have no option but to try to reach the top of google in their domain, or in the case of this sort of move, actually pay for a presence in google results (because probably 90% of users don't look below this widget taking up most of their page).