What to do?

I really want to leave my job, I hate it here. But I really don’t want to get a new job and be the new person and what if the new job is toxic like this ?? For some context , I’ve been led to believe a promotion is in my future but new information has come to light through the grape vine that makes this very unlikely.

I earn a good wage for a 22 year old but I feel as though I could earn more with my experience just not sure what to do.

Need some advice :((