To me, Azzanadra's announcement that Zarosians can't trust the player and that they will be on opposing sides in their first post-Azzanadra quest encounter makes perfect sense.
At this point, Azzanadra has been with the Council of Seren, an assembly of NPCs the PC has encountered in many different quest lines. Most of them have never been in the same room together, and all follow different gods, philosophies, and beliefs. Azzanadra has had the opportunity to speak to Sir Amik of the White Knights, Brundt the chieftain of the Fremmenik, Osman from the desert, Ichi the leader of Cyclosus, and more. He's probably heard how you've taken one side or another in various conflicts, such as how you helped Zanik defeat Bandos in 'The Chosen Commander', and how you formed alliances with various factions not related to Zaros.
And of course there's the whole World Guardian thing.
With all that in mind, Azzanadra is smart enough to know that even if you've tried NOT to disappoint him in the past, he can't rely on you if the Zarosian agenda brings the Zarosians into conflict with the other factions. Your loyalties are too divided, and you can't be influenced by Zaros' loyalty aura because of your World Guardian status. You're just too much of a wild card.
There's only so many times you can disappoint Azzanadra before he decides it's not worth the risk. And even if you've picked the Zarosian option in previous quests several times, he still can't completely rely on you because the other factions you've allied with have beliefs and/or agendas which clash with the Zarosians'.
Finally, be wary of assuming this is a black and white good vs evil thing. Just about all the gods we've been introduced to have their faults, and so do their followers. In the Sixth Age, there's a lot more moral ambiguity and nuance.
29-May-2021 19:01:10