If you were being transferred from a job you were ready to leave, and where you hated the boss, how much of that would you communicate in your goodbye speech?

I am being transferred to another office, which i requested months ago. In the meantime, in the past few months, i got to hating my boss and I’m so happy to be getting away from him, and the feeling is probably mutual. I am so ready to leave and do something different! However i will still be working for the same municipality.

at the party, when i give my goodbye speech, should i mention “that i’ve had my ups and downs here” and say that this is something that i have been wanting, or should i keep it impersonal and positive?