Nah, its not how they operate.
Starz and Showtime value on demand views. They count that closer to ratings when they make decisions to renew shows. That's taken in to consideration.
HBO's primetime Sunday slots always do #s. They mainly focus on the live ratings and they don't put stuff up early on demand so it doesn't hurt the live ratings. Insecure isn't GoT but they do huge #s when new episodes air. Check black twitter during real time when Insecure airs and right after it ends. Always big conversation about what went on that at times can trend. So that speaks for itself.
If Insecure wasn't big and only had a niche audience it would air Friday nights along with shows like High Maintenance and that new show Bettys.
I wouldn't be surprised if the therapist is fed up with Molly. Look at how infrequently she has sessions. Had to start off her voicemail I know we aint talk in a while
Molly the type to think things are going well so she doesn't have to work on herself any ore, boom shes cured. Then things begin to go bad in an area she hasn't discussed with her and she lets it simmer until it boils over to address it.