Firstly, this reviewer’s profile says they’re based in Melbourne so they’re obviously just steaming with hot jealousy. But we’re more caught up on the fact they find the harbour hard to find or access via public transport. It’s right there, all trains lead there in the end, you literally can’t miss it.
The most vicious critics aren't those employed to review a thing, they're the visitors and users of those things. Tripadvisor is a site where these thing-users can vent the built up, grump steam from their spleens and boy do they do it with gusto. We trawled the reviews of Sydney attractions, landmarks, beaches, and events that many visitors felt earned a one star Tripadvisor "terrible" rating and found some absolute corkers. Lucky we still love you, Sydney, these people... don't so much.