Ads autoplay, interrupting gameplay as soon as you buy in-game decor or change tabs or anything of note.
You can only ask for one item each DAY from neighbors, including but not limited to: Expansion permits, materials, and gems. ONE. And most crafting decorations require multiple items, average being I believe around 5 - 8.
Gem and gold (currencies) accrual rates are abominable, even with ad offers, which funnily enough don't work or appear to be illegitimate.
There is a consistent glitch that'll erase your gold progress. I'll hit a job for the sim to do and come back six hours later and it's not done, I have to reselect it and wait again. I often have to relaunch the app just to make sure it went through.
At higher levels the game doesn't reward you with more decorations nor by lowering prices for decorations you don't have. There's no reward outside a pittance of gold and a pat on the back (sometimes). It's as if the game is going "Oh? You're still here? With our lackluster support, autoplay ads and no new furniture since inception?" Last part is a bit of hyperbole but you get my meaning.
Worst part is I don't actually know if they intend on adding furniture at any point or if it's currently got a team somewhere actively working on it.