un ‧ suit ‧ ed /ʌnˈsuːtəd, ʌnˈsuːtɪd, -ˈsjuː- $ -ˈsuː-/ BrE AmE adjective [not before noun]
1 . not having the right qualities for a particular job or purpose
unsuited to/for
He was unsuited for the job.
old school buildings unsuited to modern education
2 . British English two people who are unsuited are unlikely to have a successful romantic relationship because they have very different characters and interests SYN mismatched :
I now realize that Tom and I were totally unsuited.