The watches that are available - are typically ones that are less desirable on the secondary market or on the wrists of people. Not so different for desirable items from Ferrari, Hermes, RM, and other Companies that have this kind of stock.
Part of the behaviour may be bad service, but honestly there is a lot of flipping and grey market dealing going on that the brands want to build a long term relationship. Don't forget these companies could make more money simply by raising their prices for more desirable models to grey market prices, but they don't on purpose to create this artificial demand. For instance - Practically any AP RO in stainless or Gold is selling at equal or higher than retail (even some CODE models much to chagrin of detractors) so I can get where they come from.
Furthermore, if you speak about AP and/or Patek - I've found that depending on Region, supply of models has been either extremely good, or extremely bad given the disruptions in watchmakers and suppliers actually being able to go to work.
If value or supply is your thinking, the grey market could be a suggestion to start - and then use that as a way to strike a real interest in a brand when you meet them. Sometimes it's good to enter a branded shop with a brand on your wrist!
Good luck
Peter