Luckily I didn't experience rude passengers. I did read on FB many people complaining about kids. I will say that there were a ton on this sailing, way more than I've ever seen, but it did not ruin my time at all.
The main pool was closed several times...not sure it was every day though. The good news is there are many pools to choose from, but like almost every other ship, the pools are going to be crowded at peak time no matter what.
I think some of the beauty of cruising is that 2 people can be on the same cruise and have wildly different experiences. It really can come down to what you make of it. I prefer to go with the flow and enjoy rather than nitpick or critique every little detail.