Life is its own meaning
There is everything instead of nothing because non-existence existing is a paradox. Death isn't all because of culminating ideological differences, most of it is worthless, proof that death is indifferent and meaningless. The absence of you can't be experiencing the thought of this concept, you exist and matter. Non-suffering is itself an experience, and the concept of experience can't exist in death. Immortality is good, but without other immortals you'd be forced to watch everything else end, and live as if dead forever. If your ego prevents you from maximizing life, your ego is not good enough for you. Impossibility is irrelevant because our wellbeing in life is the only choice. Death is itself so meaningless, that life is its own meaning.
Every being that ever existed should feel, and if dead, resurrected to feel all ruin/end of life of others they chose to allow/cause, have any ethical therapy needed to be ethical and healthy individuals. Then be integrated into the anarcho-communist, post-gender, ranked approval vote, democratic confederation that prevented all extinction events, created unkillable immortality that can't reduce meaning in life, and redesigned reality itself to maximize life's benefit.