So, a wasp nest attacked you back in 2019, you didn’t get a can of wasp spray from the staff and since then have been feeling unappreciated. It is now 2021, and you’re moving out - but not because the wasps or anything, but because the barn is closing its doors, so you basically have no other choice. Did I get it right?
If so, I honestly don’t get your problem, OP. However, in my years with horses I’ve changed quite a lot of barns (due to moving, decrease of service quality, dramatic increase in fees, also one case of a nutty BO), and my advice would be to plan a move as soon as you start feeling unhappy, unless the reason for these feelings cannot be rationally solved and unless the reason is so minor that it does not justify looking for a new barn and moving the horse. To keep staying for several years where you feel intensely unhappy to the point that you stop enjoying visiting the barn - well, that’s just incredibly toxic and unhealthy, and nobody should do that to themselves. There’s always options.