For a minute i thought you were talking about reddit's undesign. Yeah Indiehacker has almost comically bad UI but you're more likely to find people that are hustling there. HN is more about corporate office politics.
I couldn't tell which site you were referring to at first lol. Indiehackers is particularly unbrowsable, even though I tried browsing it using different browsers multiple times. It's slow and very glitchy.
Two, the endless scroll, but they have your profile button on the footer and other essential links? How has that not been brought up?
The site overall has annoying and bad ux.
Makes me wonder if the site has essentially been abandoned by the owner. At the least it is neglected.