100%
I think once we lost Game 3, he officially quit on the team and was ready for FA. I mean, we swept the Pacers series and Kyrie played well. Then we had a blowout win against the Bucks in Game 1. But then we lose Game 2, also lose Game 3 in games where Kyrie struggled, and once that happened I think Kyrie mentally decided that was that.
Anyone who thinks he didn't quit on the team must be an idiot that thinks he can actually defend Giannis 1 on 1. As others have mentioned, he basically went against the defensive gameplan each time down the court and stopped playing with the team.