[hbbio]

Like many here, I have a PhD. First, I did this because I strongly wanted to do it, and I don't regret my choice at all.

In your case, since you don't like the environment where you are and where you would pursue your PhD, it seems a clear no! You want to do a PhD because you either want to stay in the environment where you are (e.g. your lab internship during M.Sc.) and you want to continue doing more advanced research with the same people. Or you have been in (remote) contact with a team or a researcher and you badly want to work a few years with them and make their research topic yours. If you feel none of these situations apply, you'd rather go (working) in an environment where you will thrive.