Literally most of that can also be applied to Episode IV.. For that which cannot

No, it really can't. There are a handful of continuity errors, but not many. There are also very few created within the other two trilogies. The sequels have so many contradictions between each movie, sometimes within the same movie even. It was rushed with two directors competing against each other. Not something written by one director over time.

Starkiller base didn't just blow up one planet, it blew up SEVERAL planets with SEVERAL figureheads... Asking why the Rebel Alliance's Government doesn't exist anymore is like asking why the American Government is limited to just the Enclave in Fallout. BIG FUCKING NUKE!

It blew up several planets in one star system. You have to keep in mind we're talking about galactic powers here. It's like blowing up Washington DC and then the entire US doesn't exist anymore. To use your Fallout example, there are many power who claim inheritance to America, and that's after an entire nuclear war wiping out all civilization and hundreds of years later. There should still be many star systems under their control, with hundreds of planets, billions or trillions (or more) citizens, and several fleets of ships patrolling around. However, there's literally one fleet left. How? Even if every planet was destroyed there should still be many fleets that were out and about.

as for Sidious being her dad, blame the fanboys who REALLY wanted her to be Luke's kid that complained about the "nobody" reveal in Last Jedi

I can only blame the writers, directors, and Disney. It's their choice to ruin the project because fans asked for something. That's how we got ep 7 basically. It's just the same thing we've already watched again because they wanted boring generic action and couldn't make something new and creative. The new bits suck, for the reasons I've stated and many more.

The sequels aren't perfect, but the haters shat on the prequels too... Heck Star Wars fans hate Star Wars movies so much that the only film that's safe to "like" in a group of Star Wars fans in A New Hope, and even then it better not be any of the Special Editions.

They did hate on the prequels. That's true. It wasn't for poor writing or world building though. It was for subjective reasons, like Jar-Jar being annoying (OK, maybe this one is so bad to be objective), or the opening trade negotiations scene being boring.

As for fans hating every movie, yeah. That's what you get when you have a large audience. You get a diversity of opinion. Some people care about how good the writing is, some the world-building, some how well told the story is, some the action, etc. None of the opinions are wrong. There's stuff to like and hate in every movie.

The sequels are objectively poorly written though. There's so many holes and also a ton of things that just don't make sense if you consider them for a minute. (The sith knife Rey finds with the Death Star map would require standing in a specific spot, and she just happens to end up there? No one thought about that for more than five seconds when writing it.) You can still enjoy them. There are large objective reasons why many hate them though. Before the Star Wars universe felt consistent. After it does not. There was always The Force to explain away minor things, but the sequels have mechanical issues that it can't fill.

Edit: This was far too long...