Here's the summary:
The author is saying that people who write about productivity are, in a way, the devil, because they convince people to do things they hate. The author is also saying that these people are not literally the devil, but are just as bad.
The article argues that humans are not "naturally" lazy, and that the feeling of being a "lazy piece of trash" is actually a result of the unconscious mind doing its job. The unconscious mind is only able to communicate with the conscious mind when there is a problem that needs attention, which can make it seem like the unconscious is lazy. However, the unconscious mind is actually responsible for solving a lot of problems without the conscious mind even realizing it.
The author is talking about how people who are successful often have to eat a lot of frogs (do a lot of things they don't want to do), but that doing too many things you don't want to do can lead to burnout. The author suggests that people should stop and think about what they really want to do, and not just do things because they think they should or because other people are doing them. The author also talks about how some people never get to experience true love because they're stuck in bad relationships, and how this can be just as bad as eating too many frogs.