Screen shows streaks, distorted and sometimes shaky display

It could be a compound issue, but this will almost certainly require a display replacement. I'll try to explain here as succinctly as possible but my brain is trying to word vomit so you might have to bear with me.

Cracks in displays can cause all kinds of weird behavior and the last picture is not something I usually see as part of a display issue, but it's not unheard of. The vertical lines though surrounding the crack are textbook for LCD panel damage.

It could be related to a TCON problem, but replacing the TCON board alone is not a repair I would recommend since it's not really modular. It's effectively built into the display assembly and the cables are soldered to the TCON board. So there are some delicate procedures needed to replace it.

Unfortunately displays for this model are pricey. Most Apple displays are. But this one specifically. I would also be mindful of the Lid Angle sensor on this model since it's easy to tear during repair and is a bit inconvenient to replace. It will need to be calibrated to work properly and Apple is effectively the only people who can calibrate. There is a third party tool now available to do that, but it is a very recent development.