How do I make sure my next job is a better place to work?

By not getting nervous. Keep your calm.

Finding a new job takes it’s time. Maybe half a year, I don’t know. There are statistics that answer this for your region and your field. Grant the time to yourself.

Stay there if it is still bearable, but start your looking around now in all earnest, as if you were free already. If the money reservoir’s are running low, make reasonable decisions, not fearful ones.