Pretty sure you have a leak. i have a 2007, bearing went a few months ago around 95k miles, coolant was full and ac was working fine up until the bear died (my died like yours, balls falling out as i took it apart). I replaced the full compressor in my case, but it shouldn't lose any coolant in the 10 year period, and you were down significantly.

I think you'll be back to this thread soon unfortunately.