I agree, Italy didn't deserve to play in the world cup because they played badly in the world cup qualifiers.
In their matches, there were a lot of bad luck, unused penalties, missed opportunities to score, but in the end, if you can't achieve the desired result, you don't deserve success.
They were excellent at the last European Championship and became European champions, but it seems that their magic has been lost since then

The time has probably come for the rejuvenation of the Italian national team and a new beginning.
In that case it might be true, they need to make Regeneration now.
Even though some of them are young players, there are still some who in my opinion are too old for them, such as Chielini and several other players who are over 31 years old and above.
Even if their performance still shows something good but still this will only make them complacent and inhibit regeneration there.