do you ever wonder why?

I enjoy suffering to an extent, and I enjoy causing it.

I enjoy pain as well, and there can be pain and love.

I love being being Isolated, and we discriminate to make ourselves feel empowered.

Nothing last forever, things die out, it's just the way it is. You can't just decide to stop loving someone it fades. You can decide not to be there for someone, but sometimes, and very rarely it's the right thing to do.
Love is complicated, true love lasts as long as the person is alive, love can fade and grown as much as it wants, not as much as you want, you can't control it.

Because it's nearly impossible to change the mind of 6+ billion people, we can't talk to all of them and change everyone's perspective, it's just not possible.

It's a dog eat dog world, you have to fight to be on top, humans crave power and dominance.

Society as a whole corrupts people into being this unachievable "ideal" person, we strive for that, thinking it will improve society, even though it makes it worse, people stop being who they actually are, the thinkers are alienated for thinking outside the box, same goes with the artist of all types. So they try and fit in and lose themselves to society, and then we can't come up with new techniques, therefore we're stuck at the same level and it limits societies evolution.

Sorry this was rant-y e_e'

Hm, good question. I shall think about it over some tea.

You make it sound as if it is all intentional.

Accidents do happen. People do not have complete control over their emotions. People do not always think before they act.

You want peace, yet to achieve peace you need forgiveness, and in this question you are doing nothing but blaming.

Think about it for a second.
How boring would life be without conflict? Negative emotions cannot exist without the presence of positive emotions. That's the way it is. It is a balance. It will always be that way, because eventually we just get sick of being nice, and thus the hate begins....