"Be careful with hires and team
...
If you aren't sure and don't like the person after a week, fire them. There's enough people that you WOULD like after a week"
I moved hundreds of miles for my last two jobs. If I were fired a week into a new job in a new city by a boss who "wasn't sure and didn't like me after a week", I would be devastated.
I would rather get 100 job rejections than have to go through one experience like the last bullet on slide 16.