Wow! Now step away from the keyboard and take a breath.
What I find humorous is that people in my neighborhood love their snowbird neighbors and anxiously await their return in the fall/winter. It's those "other people" that clog up the restaurants and golf courses.
The underlying situation is competition. Competition for restaurant seating, town center seating, starting times. Full timers feel pushed aside by seasonal residents, and seasonal residents feel they need to enjoy the amenities they are paying for all year as much as possible during their stay. As a previous poster stated, that creates potential conflict, as facilities are limited. Full timers should remember that some of the crowding is also due to their guests.
It all depends on how you look at it. If you consider the summer months normal, you may chafe at the crowds in the high season. If you look at the summer months as a bonus, I think you are less troubled in the winter.