> Life didn’t always exist

Define life.

> So ethics and morality aren’t fundamental truths of existence, as one cannot apply these to non-life.

Nor is that its intention, that does not make them unable to be objective. It's a false equivalence.

> Mathematical relationships existed whether or not there was anybody to observe them.

I think quantum theory would like a word with you. But, that still does not argue that morality can't be objective. Just because we've thought of them, does not make them illogical or non objective.

> Sure, but that doesn’t make it negative overall. It’s also more like +/- 1 -/+ 1 = 0. Non-existence is neutral.

Sure, so living is a positive then. I figured you would've wanted me to express existance as a 0 (nihilism), hence my example.