Uncongenial (adjective)

Not pleasant or friendly; inhospitable or unsympathetic.

Origin:

From un- ("not") + congenial ("pleasant, friendl.y")

Examples:

1. The uncongenial atmosphere made it difficult for me to relax.
2. The uncongenial attitude of the staff ruined my vacation experience.
3. It was an uncongenial environment for a child to grow up in.
4. I found the uncongenial work conditions unbearable.
5. The temperature was just too hot and uncongenial to allow for any outdoor activities.