Atziri fight bugging out makes me want to quit the league

This league was going great. I was enjoying Druid and shapeshifting skills, and my self-made build for Mortar Cannons really hit its stride. Progression through the atlas is comfortable and steady, and I'm seeing citadels at the edge of the fog to aim for.

The temple has been a good roguelike/boardgame experience too. Planning around room combos and trying to mitigate bad destabilizations is a healthy mix of risk and reward. Storing up several temples to hit after a day of mapping gives some good variety of content to not burn out on one or the other.

I just got a temple setup to connect to the Atziri boss for the first time. There were some messages I've seen that it was a one-shot fight; dying would forfeit the attempt. So I decided to put off doing it for as long as possible, to prepare my gear and myself to do it for the first time.

Once I capped out my temple crystals again, I had no more reason to not go for it. I tried to find some videos on the boss fight to see some mechanics. I took a look on the wiki and POEDB to try to figure out if my build was tanky enough. I traded for some gear upgrades. Took a deep breath and started the temple run.

Turns out I probably overdid the preparations. Phase 1 was over in a flash. Phase 2 was a little slower, and a corridor type attack I hadn't seen before caught me off guard and hit for over 50% of my health. But her life bar was depleting quickly and I was sure victory was in sight.

But it never came. No final cry to signify the ending cutscene. Just a boss at ~5% life, slowly regenerating energy shield and doing nothing else. I dodge a lingering attack, a second, and then I realize something's wrong.

Turns out I can pause during the fight, so I take a moment to see if other players have experienced this same thing. There are multiple posts on the bug forum here. Maybe it was my mistake to not include bugs in my preparation research. But it seems like the fight is bricked anyway, with no proposition of a fix in place.

This hurts. I did the prep work the game asked of me. I put my best foot forward and it's all for nothing. All the buildup to my first kill and it ends in a whimper. Building a new temple and going again isn't going to be the same because I KNOW I can do it, it's just a formality.

I'm angry. I don't want to direct it at the developers because they're not responsible for my emotions. There's probably nothing they can do to make it better for me. I logged out inside the boss arena, but there's no chance when I log back in after they've fixed the bug, the ending of the boss fight will play out properly. There's no way they'll give me and every other player who's experienced this bug the loot they're owed for the kill.