I kind of see what you mean but for me I really liked it as I am not very good at languages at all, maths and science makes more sense to my brain.

I appreciated that they went through and made links with the English language based on the common root that they shared be it Latin or whatever. For me this helped me a lot to understand what was going on in the background of the language and how I could relate it to what I already know.

Everyone learns differently and so will find different methods effecrive. Duolingo was a lot better when it first came about but now it is all about getting people trapped in a loop of feeling like they are learning something when they aren’t so they can maintain subscribers.