Are acts wrong in themselves? Or does it depend on the context?
So few words, yet such a difficult question! Luckily, God actually addresses this in the Bible. Ecclesiastes 3 1-8 states how "for everything there is a season". This is, of course, within the context of more general acts; if you start to specify and say "is there a season for punching annoying friends named Juan who wear orange t-shirts and spill my White Claw", then you will probably run into a lot of things which are just forbidden straight up.
For example, there is never a time for rape, but there is a time and place for sex, and the Song of Solomon celebrates that time and place, while also condemning sex when done in an adulterous situation. Likewise, God says "Thou shalt not kill", then tells David "Hey, go slaughter that entire city". God isn't being self-contradictory here; this is proof that God is not just a construct of man's laws, since God realizes that morality is complicated, and that what is wrong at one time is acceptable in another.
It is my belief that sin is not the arbitrary word of some cosmic despot, but rather that which brings imbalance to the world, and our loving Creator warns us against it because He knows of the dangers of it, but He is also aware of the need for balance. Sometimes you need to accept and love others, but toxic positivity can actually have negative effects; ergo, things are out of balance. On the flip side, cynicism will taint one's life and also have negative effects.
Most things in life are like this. A certain level of balance must be found, and often morality is very situational. A lot of sin is more in the rebellious spirit; the act itself will be judged by God, but the rebellious spirit is what He finds most offensive.
So do your best to listen to God, and remember, if you make some mistakes along the way, that's all covered. It's impossible to always make the right choice, even if you're trying to, and God knows that. That's why He died for us. So do your best to be your best, and let God take care of the rest.
Edit: Oh. Missed the "atheist" thing below your pic. Okay, all the stuff about God aside, this is the basis of the Christian religion and why I believe it to have such a positive influence. I agree, too many Christians oversimplify morality. The basis of morality is, at it's core, what brings things into perfect balance, which we believe is the perfection God intended for the world.
In terms of a scale, thought, not all things weigh the same. In a world of perfect balance, we would have no need of violence, but sometimes to balance the scales from one extreme another is needed to prevent total collapse. It's a broken system, but Christianity recognizes that the world is broken and needs a fix.