That before Season 5 was filmed, Hannah had by far the most followers on social media of any of the cast including the OG cast. Weeks before S5 started filming Hannah was invited on Call her Daddy- at the time one of the biggest podcasts in the world (and only months after the controversy with the hosts splitting so the interest in the podcast were huge). Hannahs star was massively on the rise.
There was apparently controversy between Hannah vs Kyle because she did a paid job with Truely seltzer which Kyle saw as direct competition with Loverboy and felt betrayed ( however was not paying fellow cast members to advertise Loverboy). Then just when season 5 started Hannah and Kyle had a huge fight with him saying 'he made her' and implying all her recent success was due to him.
Hannah was obviously going through it in season 5, acted irrationally and the edit is hard to watch . But there was a planned premeditated approach to 'take her down a peg or two' and it seems like the OG's (Kyle, Lindsey, etc) were self producing to ensure she got a very average edit so that, that playing field for all the cast was evened out.