Maybe it's an unpopular opinion, but I assume students complaining about their teachers being bad because they are not as good as some internet people are usually pricks who aren't really into learning and are more likely looking for an excuse not to learn. Those internet people aren't going to give you an exam on what you actually pick up, nor are they going to have the data to see what the class is doing poor on and needs to learn.

Most of the shit you learn in school isn't going to be used in real life, but that's not the point of it. It is essentially a gym for your brain, so dissing your personal trainer just because there are athletes with advice that might be better for you is not a good look. This example really is only useful for people who have learned programming before math, and knows the differences and limits of the programming.