Learning to code isn’t it. Spending so many hours practicing Dijkstra’s algorithm and object oriented programming is relevant to building software for other people to use, not controlling it or maintaining your own things.
If you want control of your own machines, learn the terminal, learn operating systems and how to understand network APIs. Learn how to use WireShark to examine how your own devices talk to the internet so that you understand how they work. A generic programming course will not take you in this direction.
That depends on the worse service? In my neighborhood it would be the delivery. Imagine ordering, giving advance notice even, and then the food arriving more than an hour late and long cold because the driver decided to dropoff the food in a way most convienient for himself to drive.
I rather not use a 3rd party app but sometimes i get sick and need something brought over.