In First Order people are segregated by social status, there are "normal" people, the superior/special group (force users, high ranked politic & soldiers) and "omegas" (or call it whatever you want), the lowest social status. Status may change but person who became "omega" is disgraced for good.

Hux screw up something important - Starkiller base or anything after that - Snoke demoted him from the special to omega and sent new general on Finalizer. Hux is trapped on ship full of people who can do everything with him cause there is no law protecting omegas.

The new general hates Hux (he knows him from academy / hold grudge) and makes Hux's life a hell. Like announcing Hux will serve every officer/trooper as stress-relief, cutting his food rations, etc.

Yet Phasma & crew are loyal to Hux. Even Kylo keeps eye on him to ensure his safety (Hux at first thought they want to humiliate/use/hurt him and is grateful/shocked how they care)

+ Phasma takes Hux on her patrols, so no trooper would hurt him.
+ Hux's former subordinates "reserve" him for every night, so he can sleep in safety and eat enough
+ Kylo claims Hux as his "omega" to piss off the new general (they talk about FO's situation and together they make strategies against resistance)
+ Matt the technican (not Kylo) is "omega" too yet everyone is scared of him. Hux befriend the awkard man who stopped (sexual??) assault on Hux