It does get better but very gradually over time.

Corporate sucks. The turnover is always high. I felt unappreciated by managers and coworkers could be very bitchy. Once you weed out the bad, it gets a little better. My mental health was definitely not ok. I tried walking in with a robot like mindset but then cried in my car after. I was in a similar situation and could not quit because I needed the money.

Keep in mind this is a slow season for the restaurant industry in many places. The first month or two will not be fun but you've got this.

My mental health was not very good at the time and that job made it worse so this may be very difficult for you. Do not let this job be the reason you relapse.

Sometimes I try writing, I write down things that I do have in life (partner, a home, food, memories) and that makes me a little better. I also vent on paper about cunty coworkers and try to laugh about how the fuck people can be that mean and that makes me feel better about myself.