These are all sadly perfectly true. Except for the alien origin BS

Okay, I wanna know where this "ecologist" got their "degree".

Bad backs are the result of evolving from a forward-lean knuckle-walking stance to a fully upright posture that puts all the stress on the lower back and hips. Backs were not redesigned as part of the process.

Sunburns are because we're no longer covered in fur. Our skin is directly exposed to UV rays.

Almost every single species on Earth is "naturally violent". Herbivores still have dominance battles amongst themselves for mating rights and territory; some also violently defend themselves against predators.

Beyond that, our DNA is nearly identical to every other living creature on Earth. The Abyssinian house cat shares 90 percent of its DNA with humans. Mice and humans share, on average, about 85 percent of their DNA, which is one reason why mice are so useful for medical research. Humans share more than 50 percent of their genetic information with plants and animals in general. They share about 80 percent with cows, 61 percent with bugs such as fruit flies, and 60 percent with the banana.

The numbers can be misleading, though, because much of the shared DNA is "silent" and is not involved in the coding sequence. However, this leaves absolutely no question that humans evolved alongside every living thing on our planet. (The above DNA facts quoted from [sciencing.com]