Why is Instagram so inconvenient?

‌I'm forced to use it because they only provide information through Instagram, but
it is seriously so inconvenient.
There is nothing I can do my own way.
Now I can't even log in on my PC.
It keeps working on my phone, but
even when addresses are posted in the feed, I can't click them, and I don't even know how to share them.
If I scroll past something like a Short and try to go back, it disappears.
Search doesn't work either.
Just thinking about it is so frustrating.
I'm not sure if it's inconvenient because I don't know how to use it,
or if everyone else finds it inconvenient but just deals with it.
Sigh...