These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Gulliver's misfortunes are intentional and he prefers being In Harm's Way. He secretly loves his arduous trips, hence why he spends very little time at home before he leaves for sea, intending to be shipwrecked again.
Anvilicious: Swift isn't shy about hiding his contempt for the English society of his day, or for human beings in general. However, what kind of society he advocates as a better alternative (or even whether he thinks a better alternative is possible) remains hotly contested.
Hilarious in Hindsight: Part two describes Brobdingnag as being located in a part of the world which was not known to Europe at the time. Now we call it Alaska. It's certainly big enough...
Also, the invention from the Monkeys on a Typewriter entry - again, a device that randomly combines words so that "the most ignorant person, at a reasonable charge, and with a little bodily labour, might write books in philosophy, poetry, politics, laws, mathematics, and theology, without the least assistance from genius or study". Today, we call this Wikipedia.