Mathematical truths are absolute truths, for example, "square root of 2 cant be obtained by dividing 2 natural numbers" that is an absolute truth.

I guess apart from math truths, and the fact that you exist there arent other absolute truths. but there are other truths that even if not absolute, the evidence supporting them is overwhelming.

"why should I have any faith in what I believe?" You shouldn't have faith, you should just follow the evidence wherever it leads, and you should be aware of the evidence that is supporting the things you think are true.

"Haven't you had moments where you thought you knew something but it turned out later to be false?" happens to all of us, one very common is realizing the religion we were indoctrinated into is false, or realizing many political or historical assumptions that many people holds are wrong, also we get dissapointed from some people, all of that is totally normal.

There are some cases where humans can have a huge imapct. I think the one who had most impact in history was Muhammed, the inventor of Islam. Had he not lived, society would be radically different in many countries.

DNA is not conciouss, first molecule that replicated itself was not DNA, we know it couldnt be DNA but we still dont know which one was. that molecule was formed by chance in a situation where millions of millions of ramdom chemical reactions where happening, then the replication continued and evolved by a blindly, its loo long to explain here mate, read about evolution and you will undersand why it happens blindly

I would say there is no need to assign a negative connotation for us to suffer. A meaningless universe goes against our instincts. For example, for many people, one big part of universe not having meaning is we are going to completely cease to exist, that goes against our survival instinct. Also we have instinct to try to improve the situation, but we will grow old and all we do will dissapear eventually.

if we define "universe having meaning" as something like " there is some goals we objectivly should follow", well, the brain has many innate goals, it evolved to pursue those goals. so when we are realize the universe is actually meaningless it goes against our intincts

Our brains do have an original "purpose", it was an evolutionary advantage that evolved to make more efficient the genes replication. Brain is a machine of solving problems towards a goal. So it seems normal that we deeply feel bad at realizing universe has no meaning.

If im not wrong that is only proven for irrelevant decisions as choosing what object to take. I tend to think free will doesnt exist but as far as i know its not proven.

and not only multiverse, if time happens to be infinite in this universe, all possible atom arrangements will happen and infinite amount of times, and that might produce our councioussness too

Number 1 is totally true. But that doesnt mean we should make humans extinct, that means we should fight for justice.

Number second is not a valid argument, because yeah, that would make other people suffer, but making humans extinct would make them lot more suffer, so its not a valid argument to make humans extinct

"meaning we are deliberately perpetuating their suffering knowing that a percentage of them will always suffer."

Again, there is two independent things here. The existance of the "happy ones" and the existance of those that are so un happy that would want to cease to exist. The first doesnt affect the second. Those who dont want to exist can cease to exist if they want to.

Now they can say that if the happy ones continue existing and reproducing then there will be some new "Unhappy ones" that will have to pass through suffering until they decide to suicide. But that amount of suffering is supersmall compared with all the happiness. And also, if we dont bring a person into existance then this person cant even decide if exist or not. By making new people we are giving them the choice to exist or not for a very small risk of suffering briefly.

Its like for them 1 "unit" of suffering is more important than 1000 "units" of happiness and the choice to exist or not.

Its not like we have only 2 choices. All of us live or all life goes extinct. If there is someone who was unlucky and preffers to cease to exist it is his choice, but why force the rest into extinction?

Evolution provided us with moral values. Some moral values are selected by natural selection, like for example reciprocal altruism. Animals also have that.

You need tto give a definition of unique first, so we can answer.