Having been through this myself - I actually itemized the numerous problems in great detail, why they were problems, and the outcomes they would lead to - and presented this to the source of the problems (incidentally the owner) - you won’t really get anywhere. Even when the outcomes you specifically pointed out do in fact occur. The source will get mad, probably know deep down it is all true, half the company will leave voluntarily with or without jobs, but he won’t really learn anything and you’ll continue to do what you do all while both maintaining a distance from one another. Neither good nor bad, but you should GTFO.