I found Lilith too bland and absent from the game’s narrative, to really care about her “sacrifice” at the end. She was “lady on earpiece giving you objectives” for most of the game, except for when Ava was yelling at her over events that were in large part Ava’s own fault (if she hadn’t snuck into the vault against orders, she doesn’t get easily captured as leverage, and maybe Maya doesn’t die).
As for the Calypsos - their upbringing would explain their wanting to desperately leave the planet and make their own name for themselves. It wouldn’t explain how they became, like, completely unfeeling sadists who are also Space Youtubers, and want to destroy the universe. They never establish (that I can recall), that Typhon was an absentee parent - if anything, with him being marooned there with his wife, you’d think he would be VERY present. The ECHO tapes also make clear that Troy was basically tricked by Tyreen into leaving in the first place.
They also never explain why or how both of them are “leeches” of Siren powers and eridium, as opposed to every other siren in the game. And Typhon says that both of his kids were Sirens, but Tyreen describes Troy as basically a leech on her earlier in the game… until suddenly he isn’t any more? They hint at some sort of low-key schism developing between the Calypsos as Troy becomes more powerful, that literally never goes anywhere. All of this was confusing nonsense to me.
Regarding the Destroyer - it was the vault monster in the first game, that you apparently didn’t “really” defeat, which is why Tyreen says she was going to “finish what you started” to Lilith. I didn’t get the impression there was any ambiguity to any of this, though for some reason Borderlands 3 now treats the Destroyer as some sort of larger threat than any of the other vault monsters… despite you having already previously defeated it 10 years ago, in an infamously easy boss fight.
This raises another question I don’t think was ever answered - what was the Great Vault? How did it differ from the vault the Destroyer was in, in the first game? Did the Destroyer… switch vaults? Was the vault in the first game supposed to be the Great Vault? The game seems to imply that Pandora itself was a gigantic vault, it’s moon was the key, and that the Destroyer was in it… but how is that possible, if it was in a regular old vault in the first game? Why would you need a planet-sized vault to contain a monster that was about 100 feet tall at most, and defeated twice by a single mortal? Was this a weird retcon? If so, why on earth would the writing reference that you already defeated it in the first game?
Anyway, back to Tyreen - it annoyed me to no end how she just kept showing up when it was convenient for the plot, and effortlessly shutting down EVERYONE, making it clear that her entire bandit army was completely unnecessary and basically just there so that the game could exist and be longer than two minutes Virtually the entire story is ultimately the “heroes” running around gathering things FOR HER. The game itself even says this, with her mocking you by saying you’re doing her work for her - which you TOTALLY ARE! If you actually think about it, literally everything you do in the game is either 100% pointless because it does nothing to stop or slow the antagonists, or is actually actively HELPING them.
- Open first vault and defeat monster: Thanks, I absorbed the power I wanted! Oh, and Troy took Maya’s power.
- Open second vault and neutralize monster: Don’t care, took Tannis. Also, we are just absorbing the purple rocks now.
- Defeat Troy after he literally leeches power from Tyreen: Doesn’t matter, Tyreen survived, and apparently is no less powerful from the experience.
- Open third vault and obtain key to access machine to stop Great Vault opening: Doesn’t matter, Tyreen just shows up and easily destroys the mechanism for it.
- Teleport to where Tyreen went, and easily defeat her in a 1 on 1 fight after she merges with a monster that EATS STARS. Despite easily losing every previous 1v3/4/5/6/whatever encounter with her on her own.