I think the main thing that goes through their head is anger that you aren’t doing their bidding and putting up with their rubbish, and fear that their true nature will be exposed in public.
They feel they are going crazy because of the lost control.
But they won’t admit it. No, they will make out that they are jubilantly happy and free and better off.
When or if they find someone else or some other supply, they will idealise it at first, but the cracks will soon show in any relationship they have, they will start to get angry and restless with that person and it’s back to square one.