Those are too many unwarranted assertions and plain non-sequiturs in a single paragraph. At this point it seems clear that I won't convince you, no matter what arguments I employ; and that of course you won't convince me with those theoretical unwarranted assertions and obvious non-sequiturs, as I know from experience that Esperanto is clearly easier than English.
So, at this point, it is better that people interested in getting objective information take some basic course and decide for themselves. Fortunately, there are very good basic courses that can be easily completed in 2-3 weeks.
A true expert in Esperanto, the linguist and psychologist Claude Piron, debunked that article years ago:
http://claudepiron.free.fr/articlesenanglais/why.htm