About hate and other negative experience, it is empirically linked to hormones that induces inflammatory responses and other cellular signaling leading to cellular senescence for example ( aging ) and has many other impacts on the body overall, that impact health negatively even more deeply if it is chronic.
About the natural instinct of preservation, I find impossible to come to such a conclusion if you look at the world with an anthropocentric assumption especially when humans have shown to be the least capable of preserving their environment.
There is in fact empirical evidence of cooperation driving the complexity of evolution more than the competitive exclusion principle. A quick search could give you what you need, even if the subject of exactly what and how evolution works, it is today not just what I am implying but an empirical truth. Evolution and natural instincts are still not solely base on cooperation at all but it is more leaning toward conservation of an equilibrium and some sort of power to evolve using free energy ( those theories still are theories tho and need more time to find flaws in them or to be proven ).
Do we really then observe such a plethora of competitive behavior or is that more of a Baader–Meinhof phenomenon derived from our old school theories that we learn and were pushed down our throat especially to justify an egotistical liberalism as a " natural solution " ? And are today under so much stress when looking for proofs ?
I'll never say competition don't at all have it's place, it does and an important one but it's not the most important, that's what science proved to this day and age if what you like just like I do, is empirical evidences.