Perhaps talk to HR. it's their job to see you supported and there are big costs for them when staff turnover so it's in their interests to help you stay. But also, if you stick it out and aren't happy then move on and either don't list it on your cv if it's really short or just be honest with them and future employers about the importance of finding the right culture that fits you. I'd respect that if a candidate said it in an interview. It shows self awareness.