I've only been on the job for one day and I hate it.
Why do you hate the new job?
The people are so unfriendly and I hate the work.
You should give the job more time before deciding to leave it. You might like other things about it.
I hate the job and don't want to put up with the people. I'm going to quit.
That's not long enough to know whether the people are actually friendly. You need to give it a little more time, and they will come to accept you soon enough. Remember, that if you leave jobs too quickly, it will get harder to get hired into new ones given your work history.