I wasted time googling this for you:
Let's start with the major thermal throttling issues that there was NO WAY they did not know about when they sold these devices and also shady advertising of boost clock speeds and not the real clock speeds (many PC makers also advertise boost clock speeds in sketchy ways not listing the real clock speeds so apple is not alone on that though).
https://www.youtube.com/watch?v=7gJ8mGFjeqA
Their "FIX" was to soft limit the CPU to lower speeds making it perform worse or at best even with the cheaper CPU they offer.
Or by slowing down older devices "to protect your battery"
https://www.wsj.com/articles/apple-faces-multiple-lawsuits-over-throttled-iphones-1522229400
or by having broken keyboards that they blamed the users for for years until they finally got sued and were legally forced to fix it (which their "fix" is already breaking again, and again they are blaming users:) https://www.extremetech.com/computing/288499-apples-third-generation-macbook-keyboards-are-still-failing)
Then there is their whole support philosophy, if its broken buy a new one, since apple won't legally sell parts to anyone but apple geniuses who 90% of the time won't fix an easily fixable problem https://www.youtube.com/watch?v=9-NU7yOSElE so they will sue anyone willing to fix what they refuse to: https://www.youtube.com/results?search_query=louis+rossman+apple+lawsuit or abuse the laws to stop third party parts from coming in the country claiming they are counterfeit when they are fully advertised as non official parts https://www.youtube.com/watch?v=AVL65qwBGnw.
How about permanently breaking a shit ton of people's phones who had their screens repaired by third parties "buy accident"?: http://fortune.com/2018/06/19/australia-fines-apple-millions-for-refusing-to-repair-bricked-iphones/
Their entire business model is designed on making devices fail after a few years and refusing to repair even easily repairable problems (except in the few rare cases they were legally forced to do so from lawsuits) forcing users to buy new devices, they actively spend millions trying to prevent and stop anyone else from repairing their stuff by in some cases violating civil rights and breaking laws.
Genius bars ripping off customers, I had a friend who went through the training and they teach their staff to try to convince people to buy new products using very sketchy tactics: https://www.youtube.com/watch?v=o2_SZ4tfLns
Then their is the little use of child / borderline slave labour? https://www.channelnews.com.au/apple-admits-to-using-child-labour-to-build-iphone-x/
Apple is a friggen TERRIBLE company, you literally have to be living in a cave to not see that.
Anyone willing to spend another 10 minutes will come up several other lawsuits and another 50+ shady things they have done but if you don't get the point by now you are hopeless and I am not going to waste anymore time googling them for you.
Still thinking of buying apple stuff?: watch this guys videos: https://www.youtube.com/watch?v=sfrYOWlKJ_g He has been taking a part and repairing apple devices and has made a living doing it for years, he likely knows more about repairing any apple device than any apple employee does and he still recommends to anyone who will listen not to buy their trash. https://www.youtube.com/watch?v=AUaJ8pDlxi8