Ehh, I really can't stand this ending.
I won't call myself a huge lore guy but still I was playing the game since gw1, I literally might be done with the series, but I will give it a weeks to decide.
It was really a terrible job and honestly I believe the idea might not have been bad(the jormag and primordus fight might have been good way to get rid of them if they wanted to do it fast), but without the execution and time it's comically bad.(for exaample the fight should have been whole map with lots of story to explain what's happening and why, similar to dragonfall or dragon's stand).
I think it's super similar case like with Game of Thrones where season 8 probably ends similarly to books but how this happens is rushed/cut and doesn't make any sense.
Also we lose the most hyped antagonist of the series in a filler episode.(which is something really hard to forgive for gw1 veterans)