they had key players out with injuries. and the same thing happened to allegri this year against ajax, so if you wanna bash allegri, feel free to mention his injury record. also, allegri actually won something way before he came to juve.
sarri knows how to win is a completely unfounded argument. he still might win even this week, but as of now, he's a proven loser.
also, the strength of the company may change people. at juve, there is a strict policy for not mentioning the refs after games. i expect our next coach, whoever it may be, not to whine in front of the press. also, unproven coaches can start winning with the right squad, circumstances, etc. it wouldn't change the fact that sarri personally bottled last year's title, and we should forever be grateful to him.