Jesus Christ, this is toxic as fuck. You are not a bad person for enjoying life. You are not a bad person for being happy or seeking happiness. Excessive consumerism isn't great but you are still not a bad person for owning things. You are definitely not a bad person for trying to improve your life or the life of people around you.
I have no idea why they decided to attack renewable energy, it's undeniably better than the fossil fuel systems it's to replace. They say they're against alternative energy immediately after complaining that a third of the world has no electricity. This doesn't even make sense! They don't want you to make electricity available to people, they just want you to feel bad about it.
Inequality sucks, but you are still allowed to enjoy things.
What does make you a bad person is actively seeking to make other people's lives worse. For instance, making a comic with the sole intention of shitting on people just living their lives.
I have no idea why they decided to attack renewable energy
Huh? The comic is complaining nerds are wasting adulthood on speedrunning and drawing comics instead of doing research that improves the world (like renewable energy).
It doesn't read that way to me, but either way my point still stands. There is absolutely nothing wrong with doing something you like, and calling that "wasting adulthood" is incredibly fucked up.
The last line is literally telling people they are terrible for enjoying themselves. There is no excuse for that.
I've done far too much research getting to where I am now. Thankfully not research. Couldn't handle academia, government and private sector is a much better option.
Edit: I forgot to say how much research sucks and agree with the point of ruining your life.