He‘s played Djere and Paire on clay, the first as outside 100 ranked, Berrettini on grass, Monfils and Tsitsipas on HC.Not really.
0-2 H2H against Zverev in straight sets. He's lost 5/5 finals, all in straight sets, that suggests he has mental issues in them. He hasn't been playing the likes of the Big 3 in them. He should've won a couple. Zverev is in better form, is the better player and has vastly more experience in big matches.
You're the gambler, so back him if you want. He may win, but if I was a betting man I'd back Zverev.
He was the underdog in every one of those matches.
He didn‘t lose them because of mental issues, and if he wins one its cause he‘s due.
Don‘t be an idiot. Someone like FAA won‘t forever be contained to 0 titles, and the player he beats won‘t be a mug for it.