If you describe a person or place as uncongenial, you mean that they are unfriendly and unpleasant. He continued to find the Simpsons uncongenial bores Hollywood was an uncongenial place to work. congenial
used of plant stock or scions; incapable of being grafted not suitable to your tastes or needs; "the uncongenial roommates were always fighting"; "the task was uncongenial to one sensitive to rebuffs
very unfavorable to life or growth; "a hostile climate"; "an uncongenial atmosphere"; "an uncongenial soil"; "the unfriendly environment at high altitudes"