Hi!
We're glad to hear that!
All 3 of Anja's endings are available, and we've confirmed that his good ending works properly. That said, it seems Steam users have also had trouble getting it based on the achievement metrics, so we may lower the amount of points required a little.
For now--keep in mind that decisions made in the common route do count towards your ending, so it's probably easiest to start a new game and skip through the dialogue, making sure you chose all of the Anja-centric options there (spending time with him, getting to know him, being honest about your thoughts/feelings).
As for bugs--we do have a bug thread on itch.io right here. There is a Discord but it's inactive at the moment. Hopefully, we'll have more time to fix it up in the new year.