I don’t think that there is much evidence of being excessively against China; I remember one incident suggesting the opposite.¹ There are certainly more establishment voices in the opinion pages than elsewhere, but they are on the liberal side of the establishment camp; the editor, for example, has attacked the government’s intransigence in the handling of the extradition bill, but is generally pro-establishment.
You’re right—I remember reading something from AsiaSentinel and getting there via the Wikipedia page on media censorship in HK, but it doesn’t link to anything any more. I should have checked. There are lots of stories on Google though so is possible to verify that I am not in fact making things up.