Disappointing due to very inconsistent story

Rating: 4/10 (28 December 2019)

** Summary **
Terrible script. Actors and CGI are OK, but no amount of acting or CGI could have saved it. As a 40-ish Star Wars fan, I no longer feel engaged with the movie franchise. I feel more like Disney was banking on me watching this as I have watched all previous movies. Despite the terrible Last Jedi.
I understand that Star Wars cannot mature at the same pace with older fans, especially if Disney wants to engage younger people. But come on! - this script expects extreme intellectual laziness from the viewer.
(Disclosure: I am not an overly enthusiastic fan, don't follow the cartoon series or other Star Wars products, but have played a few computer games in the past)
** Lazy thinking behind the Sequel Trilogy's script **
I think that the scriptwriters of the SW sequel trilogy and the Game of Thrones (last seasons) are mainly guilty of the same thing. Here is how I believe their thinking went when writing the script: "The previous episodes (that we did not write) performed well. What made their script good was unexpected plot reversals, the massive consequences of the events or the awe-inspiring spectacle. So, in order to satisfy the viewer, we need to boost the spectacle and shock even more." And so begins the shocker-twister.
The disappointment on expectations or consistency!
I want to be clear that the disappointment is not based on me not getting the expected story/ending, or an imagined extreme devotion to Star Wars universe consistency. This has to be called as objectively bad because of the inconsistencies and unlikely behavior choices by characters. And let us talk about the exaggerations of spectacle....
** Going crazy with technology and Force magic **
Most of today's Science Fiction is actually Science Fantasy. Science Fantasy contains not just technologically unfeasible, but scientifically impossible stuff like faster-than-light-travel, gravity/anti-gravity generators and gigantic energy sources packed into small machines. Genre fans, and especially Star Wars fans, are accustomed to these. We will happily ignore such impossibilities.
But Star Wars is even unique because it is a Science Fantasy story with add-on magic - the Force.
"The Force", as magic, is not inherently bad for the story. But Magic needs to be carefully planned in any story, as unexpected events like Hercules shooting lasers from the eyes, Nazguls spitting nuclear-grade fireballs and Voldemort petrifying the whole of Hogwarts School with a single spell is not just hard to believe - it ruins the story dynamic. The plot reversals in Ep. 9 are just too lazy, and we are unable to ignore legitimate questions like "Why does this look unbelievable, based on earlier movies in the saga?"
(Honestly, I know a little bit of "Legends" Expanded Universe. Characters and equipment in Legends are powerful, but this movie tops even them)
Decrease the magical spectacle Disney - acknowledge why Rogue One and Mandalorian does better.
** Summary**
We could have lived with a few plot-holes and major plot reversals. But there are literally several dozen plot holes (you can google youtube rants sure to be ou there) as well as extremely liberal deux-ex-Machina plot reversals making for a wannabe impressive story that ends up being incredulous. The ending is peaceful enough that you have a few minutes before the movie ends - so that you can dampen the aftertaste of the whole shock.
We need a retcon of the sequel trilogy. But I am not sure I am ready to pay Disney for it.