Sonarr has always been difficult to automate.
So, I have been “soft removing” completed torrents in qBittorrent.
Afterwards, simply doing a Manual Import on matched episodes.
Of course, Sonarr finds the occasional worse quality episode.
Feature Request is to be able to mark the episode (and “if contained empty forlder”) for deletion/destruction from the “ready to import folder”, because the episode is no longer needed. This could be done with a checkbox, and even potentially another checkbox to purge the qBittorrent download, if it finds it.