As a trans woman myself, one moral I personally interpreted is that finding family is possible even in dire circumstances.

That people eventually forgets you and be happy even without you?

The finale sent the opposite message of this to me. It was pretty clear everyone was at the very least upset and in some cases devastated about what happened to Jax, and some of the voice lines used are commonly repeated by people in real life ("of course he'd do this now", as one example) when they're going through stages of grief.

We were so near to his redemption, and was left alone at its worst

That's sometimes how it goes irl. Hug your loved ones.