Getting a refund sounds like the best course of action. I will be contacting Nintendo today.
This will NEVER get fixed, so best to cut your losses and move on.
My suggestion is that people just let it go. Posting to this forum hasn't done anything and this bug will likely never get fixed. Does it suck? Yes but obviously there's very little care to resolve this.
I have two users on two different switches (one OG and one Lite). The same account still experiences issues with long dark screens when launching the game regardless of which unit. The issue has to be tied to the account somehow. This is so annoying...been happening for over a year now.
We are also experiencing this incredibly long load time on a Nintendo switch light using the digital version. I believe it is profile related as it does not take near as long on another profile on the same switch.
I have requested a refund as well. I HIGHLY recommend people with the digital version do this as the Nintendo Tech Support agent had no idea of any issues with the game so its not even on their radar.