I cannot be the only one who understands this plot.

Rating: 10/10 (27 March 2020)

These people saying that Pirates of the Caribbean 3 is a disorienting, jambled, cartoonish movie with almost no plot are some of the dumbest movie reviewers ever. The movie has a plot. Let me show you this and it will seem obvious then
Let's not forget that "At World's End" is a third film in a story. It's not a stand-alone movie. Let's also not forget that the second movie ended with a cliff hanger. At the end of Dead Man's Chest, Jack Sparrow was sent to Davy Jones' Locker along with the Black Pearl. Barbossa was brought back from the dead by Calypso, and Lord Beckett received the heart of Davy Jones, meaning he has full control over the Flying Dutchman.
Now we are at the beginning of the third film. Some time has passed since Dead Man's Chest. Beckett has been using the Flying Dutchman to sabotage pirates across the ocean in order to protect his company. Elizabeth Swan and Barbossa are trying to form a team to fight against Lord Beckett by reuniting the Pirate Lords. They travel to Singapore to confront one of the lords (sorry I can't remember his name), but Will Turner has been taken prisoner there, and Elizabeth makes it obvious that he's with her and Barbossa. The lord is enraged by this and orders his men to attack. But then Beckett's men begin invading Singapore to stop pirates from possibly uniting.
In short, Elizabeth, Barbossa, and Will escape and they attempt to find Jack Sparrow, trapped in Davy Jones' Locker. Crabs help Jack reach the shore of the Locker, and the crew trying to find Jack fall down a gigantic waterfall and meet him at the shore. They need Jack to come back to unite against Beckett.
Jack comes with them. They all make it back. What now? Beckett.
The story explains itself for the rest of the way, guys. It isn't that hard to conclude that the beginning of the third film might have something to do with the end of the second film. They both connect with each other.
Anyways, great movie with one of the best final battles I've ever seen.