My manager started a company and I was his first employee, he literally started it because he wanted to make use of my talent.

So one day I finished my project on Friday and took in advance Monday and Tuesday off. Went back Wednesday to find my manager angry like "you didn't finish your project, you costed us money with our client company (a big ass famous one) I am putting you on probation and you could probably get fired if you don't get yourself together" and he said that my colleague had to do my whole work that I supposedly didn't do.
So I went to the code and checked. And I found that what my colleague did was re write my code in a different structure and pretended like he did everything and did do anything.
Got passed off so I wrote an email to my manager with the commits and links to them and their builds and made sure it's well explained, and titled the email "resignation letter" with me expressing at the end how angry I am and informing about my resignation.
Later on he replied saying it was a misunderstanding and there was lack of communication and he could give me I raise.
I insisted.
One week later I got hired by the client company and suddenly I was sitting on the other side of the meeting table. And it felt so damn good.