A former agnostic, with doubts?

[Whateverist]

Universe has a cause - we all agree on that.

Clarifying question: would earlier states of what we call the universe count as its cause? Or must we look outside the universe itself?

If the former, then yes I agree. If the latter then no, I do not agree.

... whatever created the universe, let's call it multiverse, either had a cause(begin), or always existed. By infinite regression, we'll either have a systematically continuously transcending infinite of causation, or an eternal "supreme" entity that created everything. Either way, one of them has to be the answer if we suppose every statement is correct.

I'll take the multi-verse.

Obviously, we're supposing logic applys to the universe and outside, which in my opinion it's fully logical to believe in, the fact that we can apply logic , or rather our universe is literally made of logics, and at least the same must apply to any transcending entity, if not a wider set of logics.

You lost me. Logic is logical? .. and applies everywhere and always because logic?

Existance of eternity:
I'm assuming here the impossibility to there have been a moment "outside" the universe where "nothing" existed.

I am in complete agreement.

Life:
What i'm arguing here is that basically "life" is as much of a "law"/consequence of the universe as water, i think it's illogical to actually think anything in the universe isn't a natural consequence from the start.

I am in complete agreement.

In conclusion, i think it's acceptable to find this brilliant organization of matter into life as suspicious as a determination to the universe.

Not sure I understand. Are you saying that because of how splendidly everything fits together, maybe god?

I guess if you're open to the possibility of an out-there god you might get sucked into the watch maker theory. (I'll pass.)