Kyrgios is a clown; he's always up to troll for an upset against a top guy but folds when he's the favorite or when it matters most.
You're spot on in regards to upsets & folding, but, I still don't think it is because he is immature or a clown etc, I think that that may simply be the limit of his level. Not everyone can win a slam, it is next to impossible, even for godlike talents (Gonzalez never won one, Blake never did either) It's becoming clearer and clearer that Nicholas has some serious performance anxiety issues (no pun intended).
I knew he was going to lose in straight sets. Too much expectation from the media, too much internal pressure from being at wimbledon, and up against a top tier opponent who in no way was going to fold. I should have bet on it and made some easy money.
Before the match channel 7 filmed him joking around on the practice court, mucking around like pretending he was drunk etc. Even that was most likely acting for the camera, to signal to the media, and convince himself, that he was relaxed like an apex predator, when in realithy his insides were churning.
I hate to say it, but If he doesn't get a good coach, and a sports psychologist, then he is cooked. That's it. It'll just be wash-rinse-repeat in every tournament hereonout otherwise. And since he won't do either of those things,
you can stick a fork in him.
I am more disappointed with Alexander Zverev tbh. Kyrgios' problems are pretty apparent and easy to get a grip on. Zverev though, I just don't get it. He should be cleaning up. I don't think he can even figure it out himself.
Probably just a coincidence, but it's funny how Zverev and Nick are coached by no-one or family, and both continually fail to live up to expectation.