I found that the timeline is the problem. It has been tweaked and reworked to make you spend as much time as possible mindlessly scrolling, liking and interacting.

I solved the problem by simply removing the timeline. Well, you can't actually remove it. But unfollowing everyone and everything results in this:

https://i.imgur.com/w4JZbct.png

It might not be for everyone, but it works excellent for me. And nowadays I actually complete what I came there for.