This is by design to force you install the app. Most of these days, I just treat it as a signal to neither use the app nor the website.
I'm not sure if it is intentional to push you to the mobile app, but I have to imagine the mobile app doesn't have all these issues.
The kicker is that the text is so small and to make the site usable (and readable) you need to rotate your phone to landscape mode.
This works well enough that I haven't downloaded the reddit mobile app or used their mobile site ever since they killed Apollo.
there are surprisingly many of them for pretty much every social media website.
What kind of sad, self-loathing software developer sits down and says "OK boss, whatever you say, boss, gonna go make it bad now..." I mean, I know to a lot of people, it's just a 9-5 and you do what your boss says, and "pride in your work" is not really a thing anymore, but come on. Who gets even a shred of satisfaction doing this?
I think a better explanation is just incompetence.
I used to care a lot about app designs feeling "native" but when I actually took inventory of the apps I use, I came to the conclusion that all app developers (including Apple and Google themselves) will force their own designs and theming into every app. The only exception seems to be coming from a bunch of open-source apps that don't have branding concerns to worry about.
With the realisation that most apps look and navigate must as bad as their website equivalent, I found it much easier to use web apps.