Was there any successful acquisition / investment under Tim Cook regime? Can't think of one.
Tim Cook might be a good operations guy, but he is super overrated as a CEO. Can't think of one good thing he has done other than squeezing pennies for profits. Yes, maximizing profits is definitely important and he has done a good job at that, but that's not really growth, and tech companies should be growth-centric for long-term sustainable business.
Every company that has hired penny squeezer has been struggling to gain market shares and brand value. Some of the examples are Mercedes-Benz (whose cars are now lagging behind BMW and Porsche), Samsung (where they have lost whatever premium feel its products had by using cheap parts to make products) and Toyota (cannot get a good footing in EV transition). Hate it all you want, but mobility tech is the future, and Apple has not shown any progress in EV or mobilities market under Tim Cook. He is holding the company's growth.
Look at how Satya Nadella has completely transformed MSFT, and look at how Lisa Hsu has given new life at AMD. Progressive leadership can take the company to the next level, and all Apple has done since Steve passed is squeezing cost for profits and no groundbreaking products.