Using a metaphor to illustrate a point is neither negative nor positive, what matters is if it is helpful in communicating.

The often quoted: "Infinite growth is the mentality of a cancer cell" is fairly accurate for describing human growth (when there is no real concern for any externalities such as environmental preservation or resource conservation). The abstract comparison does not bother me in the slightest.

Humans are a species like any other animal/insect. Ants have workers and drones, soldiers and queens (some ants evolved to do nearly nothing as a reserve work force). Trying to defining the worth of sentient beings based on abstract value functions (positive/negative, success/failure) is a narrow and sad way of looking at the world.

I have no idea what "game" you are referring to. Are you talking about life? I think that is a sad way to look at the world. Life isn't a game and there are many ways to live a good life while helping others (kin or not).

Not having children can be a noble sacrifice if someone is doing it to prevent passing on chronic illness or to prevent suffering. Someone caring for elderly parents and choosing to delay having children indefinitely does not make them "weak" as you like to suggest. Giving up something you want for the greater good of the world around you is worth understanding, maybe even worth emulating.

You seem to be looking at life and existence through an extremely narrow lens and judging people without really knowing anything about them. Hurling insults around casually as if you have everything figured out, which you do not (nobody does).

I would suggest you take time to talk to people more about their life and experiences before judging them so harshly. Try to hold back your insults and practice empathy instead; you might learn something about life and its vast breadth of expressions.