I think that's primarily because the HN commentariat tends to be working on projects that are cloud-native which tends to skew heavily towards AWS and GCP, whereas Azure's primary customer base is enterprises doing cloudification work.
I mean, sure, there's a bunch of inveterate microsoft haters on here (with varying levels of quality of reasoning for their hate), but I don't think their existence is the main driver of the lack of commenters using Azure.
I mean, sure, there's a bunch of inveterate microsoft haters on here (with varying levels of quality of reasoning for their hate), but I don't think their existence is the main driver of the lack of commenters using Azure.