Then you havent been paying attention. Its a two way street, player and coach, and lots of players are entitled asses, but he has shown a clear pattern of fighting with or being disliked by some of his players with both Milan (basically all the core vets + brazilians disliked him openly in different times) and with us too, doesnt seem to have a natural authority or affinity with some of his players . Football players are entitled nancies more and more, but most top coaches dont seem to have this problem (unless its downwards spiraling Mourinho, or any coach who coached Chelsea lol). So yeah its defenitely something with Allegri's approach or lack of relationship building/charismatic authority that makes this occuring from time to time.
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Really, its prolly what Paratici and Nedved are thinking, and Agnelli disagrees. We basically need to only add one CB, couple of MUCH needed quality CMs, and perhaps a replacement for Mandzu (or let Kean have the role full time), and we are good to go. If its not enough for Allegri, and he wants to sell some much needed quality players instead in some grand idea, then yeah perhaps its much smoother to replace him instead. Easier said then done, with the lack of options, but its very much necessary step to carefully consider.