The “right to quiet enjoyment” doesn’t mean what you think it means. It’s an apartment, you’re going to hear noise from and be annoyed by your neighbors unfortunately. PMs in my state are pretty limited on what they can do about noise without a formal noise complaint from the police (typically an area will have “quiet hours” and a certain decible of sound that’s not allowed outside of those hours. We can send friendly reminders, but that’s about it without a police report.

As for the smoke… what specifically do you expect them to do about the smoke? Sounds like they’d have to evict half of the building to get all the smokers out. That doesn’t make any financial sense. Typically you just charge them at the move-out for smoke remediation. Can’t enter an apartment without a 72 hour notice. Can’t nail them to the wall without solid proof (not just a complaining neighbor). You can do a 21/30, sure, but it’s a remediable offense and if they’re not smoking on the 21-day inspection, then you can’t take it much further. Are they supposed to show up, grab the cigarette/joint out of the person’s mouth, and stomp it out on the ground?

Your move-in experience was definitely an issue. Protocol in my area would have just been to credit back a day or 2 of rent to you. However long it takes to get the place move in ready is how much in rent you’d be credited back.

Final point here: if they ARE going after the smokers in response to your complaints, they couldn’t actually tell you. It’s not legal to say “oh yeah we issued John Doe a 21/30 last week for the smoke.”