I don't see the need to be offended. We haven't really seen posts like this about the swap.
Obviously, something went sideways about the notification. System issue with owned receivers, notice lost by USPS, whatever - you'll never know. I've been through similar projects, with the best of intentions, effort made to attend to every detail, and things still slip through. Not saying Dish was as thorough as they should have been, but doubt the plan was ot piss off customers.
The shipping thing just seems wrong. Experience here would suggest it's a bad CSR, not policy.
Should these things impact your opinion of the company - sure. Is it enough to dump them - only you and your parents can say.
As for the leased vs purchased issue, I'm with Dish on that. Any tech purchase should be assumed it will become obsolete.