Why do people constantly talk about the quality of language courses and how hard a language is to learn?

Hello everyone, I hope you're all doing well.<br><br>Testing language courses, buying the best courses for "top tier" languages, taking online classes, or whatever else. I think it's very funny because it's been a waste of time for me to test and find the right course. I've been using all kinds of courses for different languages like Duolingo, Babbel and Anki. Despite this, I have failed to learn more than 2 languages. And for me, the language is not so hard. It is important to address the inner mindset. A person who is good at learning languages is an important and exceptional person.