Step one is women telling guys who are clueless and having trouble finding a girlfriend that women are attracted to a set of characteristics that all add up to "nice guy."
Step two involves the men who believe what women say trying to become, fake being, or become comfortable with already being, a "nice guy" by the definition women provide.
Step three is when these guys realize that women don't actually want what they say they want. They then complain to women that women don't actually like "nice guys."
Step four is women's response, as set out in the comic.
Now, there are some valid criticisms in the response, and one or more may apply to any given complaining "nice guy." But that's not the whole story. There are also guys who don't fit the response who were rejected anyway.
There are genuinely decent, thoughtful, sensitive shy guys who were assured by women that they were what women want and they should "just be themselves."
There are also guys who genuinely bought into what women told them and who thought of developing those characteristics in themselves as becoming a better man.
The thing is, when it comes to personality traits, women are primarily attracted to confidence, assertiveness and charisma; other positive, caring characteristics such as "thoughtfulness" are secondary to these.
Speaking generally, a woman would choose a man with both primary and secondary traits over a jerk who had just the primary traits--however, she would be sexually/romantically attracted to the jerk and not a guy who lacked the primary traits, no matter how many secondary ones he had. (There are exceptions, but that's what they are.)
The reason women feed men all that shit at step one and vilify all "nice guys" at step four is that their attraction to the primary traits is at the subconscious level and they are either not able or not willing to see and face up to that reality.
The good news for men here is that developing confidence and assertiveness, as well as social skills, is of primary benefit to you. This helps you immeasurably in your life, without any regard to women.
It's win-win. You become who you want to be for yourself, not trying to live and act in a way that pleases others--with the incidental side benefit being that this is actually what is attractive to women anyway.