For many people who are so angry, it's not about the product itself, they just like to complain. And I have the impression that it wouldn't be the right device for most of them anyway.
If you look at the device class, the iPad mini has always been designed to be a portable and handy device for simpler tasks that CAN also take on larger tasks if necessary.
Audio and video entertainment, browsing, taking notes, reading and editing texts, communicating via text and video, games (including CoD), managing photos and documents, including in cloud storage, and many other tasks and special use cases are no problem. I could hold it comfortably with three fingers on the couch and it was very convenient for me during my studies. Even the disadvantages (Touch ID often didn't recognise me, front camera on the short side, a little lack of performance in the last year, and little things) didn't change anything.
About jelly scrolling: I noticed it when I looked for it after seeing it online. For me, it was a blemish that was only really visible when I put my mind to it. It was never visible to me during use, but perhaps it was less noticeable on my device compared to others.
I sold it a few days before the update because my needs and use cases have changed in recent months and for the foreseeable future. Maybe this will help someone with their purchase decision. If you just want to judge from the outside, you're having a different discussion anyway.