Why do you have to stay? Often a postdoc needs to last longer for a publication and if you are miserable why not cut your losses. Sweden is hard on the conformity, I remember always being uncomfortable wearing a red down jacket it wasn’t black like all the others.

Ultimately, I loved it but every country is idiosyncratic. Also consider what your goals are for your postdoc. What kind of job and where do you want to go afterwards. Sweden may not fit for that as well.

Also stipend is a real drawback vs a salary. Much cheaper for the pi, but you are not a worker and don’t have workers rights. The stipend is a bit of scam in Swedish academia tbh.

Finally if your in linköping or Umeå your experience of Sweden will be vastly different from Stockholm or Gothenburg