okay so kicking off a more specific discussion i'm going to first explain why i think the original trilogy works despite it having plenty of plot holes and insane coincidences and other silly shit.
basically my opinion is that a new hope and empire strikes back work very well because the bare-bones story is solid, uncomplicated, and compelling - this makes them hold up as movies even if there are plot holes and stupid coincidences, because those are screenplay problems of narrative convenience but the overall story is still working.
the 'original trilogy' is really just this if you break it down to its basic elements:
1. there's a government that is omnipresent, militaristic, and oppressive which has been in power for about 20-some years.
2. there's a scrappy group of rebels defying the empire but not really having the means to do much against it.
3. the rebels happen upon the design plans for a new imperial weapon and embark on a mission to sabotage it.
that's basically the plot of a new hope if you take out the jedi shit, and i think that's why it works so well despite assorted issues with the smaller details - because the background structure of the narrative is simple and functional and executed reasonably well if you just follow the arc of the plot that the rebels find these plans, get caught, chuck the plans out the window in a panic, a boy finds them, and in his attempts to return the plans to them ends up joining them.
and then of course there's all the force shit and the weird 'luke is the chosen one' crap but etc etc joseph campbell, blahblah.
empire strikes back is:
1. the government from the first movie taking the threat more seriously and putting a plan into motion to wipe out the rebels.
2. the 'chosen one' getting training in the powers he discovered.
3. the big bad from the government taking a personal interest in a specific few rebels and chasing them down.
which IMO again is why it works, because the backdrop of the plot is really solid, and you can fuck up a couple of the details here and there without it breaking the cohesion of the overall structure, and then you can fap around with all this telekenesis stuff and laser swords and it's just *cool* and you don't really need to explain it because it's not integral to the plot, it's just icing on top of it.
... which is why return of the jedi does NOT hold up as well, because it started to break away from that. instead of it having a solid story and some cool lore crap being used as window dressing for a simple but functional plot, it has a bunch of fappery with jedi monologues and teddy bears and then cobbles together some rehashed BS as an excuse to justify the fapping.
and IMO that's where the star wars franchise went off the rail and continues to be off the rails: instead of having a solid core story with some fancy trimmings, each movie is just lightsabers and jedi bullshit, with some half-assed ripoff of story elements of the first two movies being used as an excuse to justify said lightsabers and jedi bullshit.
all the mumbo jumbo is first, and the rest of the movie is just there to link "cool jedi shit" scenes together. the other problem is that the prequels (as well as 7 and 8) have nothing to them EXCEPT "jedi shit" - there was kind of a story in the phantom menace about how this dude single handedly took over the government, but it was this C-plot to "jedi shit" and fan servicing.
i honestly don't even remember a single thing about the clone wars, and revenge of the sith was just "jedi shit: the movie" with nothing else going on except call-backs to better movies.
the force awakens and the last jedi, same problem... there's no real underlining core story at work here so it's nothing BUT the surface details, so if those are completely screwy then the entire narrative collapses under the weight of its own bullshit.
it's all just crap cobbled together from better versions of the franchise that serves no function except "jedi shit" and "fan service shit" - so IMO elements of the force awakens and the last jedi can be "cool" but the movies are fundamentally terrible on a foundational level, the same way the prequels were.