Nail in the head.
That also explains why it’s easier for him to play against big 3, because it’s ”ok” to lose to them so he can freely try his (somewhat) best and if he wins he’s a hero and if he doesn’t it’s like ”well that’s expected against Fed/Ned/Djoke”. Basically nothing for him to lose...
I’ve been wondering this Kyrgios’ act somewhat same way.
He may be paid and/or he is paving himself publicity (read: money) with all that nonsense rather than letting his tennis do the talking. he may find that easier way to cash in than doing that only through success in tennis.