this is just nature, and i don't mean human nature, life is just creatures consuming others to ensure their survival.
it sucks but that's just how it is, humans are only different because we realize what's going on and some can exploit it to extreme levels.
i used to get sad about this, but then i realized that life is fundamentally cruel and unfair, we are born, we suffer, and then we die. some live better lives than others, but the end is the same.
everyone having a good life is simply impossible, at least now it is. in order for us to get what we need to survive and enjoy life then others have to suffer for it.
enjoying a good meal means that some creature or plant needed to die for it, the buildings that we live in and the roads that we travel are paved with the hard work and possibly exhaustion and even death of others, then there is the contamination that comes from basically any human activity, some will pay the price for that in the future even if we don't know them.
just don't think too much about it, the only good part about it is that eventually there will be an end to this cycle.