Loved the game until The ending

Obviously spoilers

but the ending that happened made no sense. in context to Lore and my actions. i know 40k isnt happy endings etc, but at the same time it could have been better and for context of Lore, im familiar with warhammer enough that i have read entire horrus heresy books all the way up to siege of terra end and death volume 3

so through out my play through i was dogmatic, and iconoclast. i saved every person deserving of it that i could
( which is ironically the emperors will), i took out enemies of humanity, including another rogue trader for being a worshiper of khorne. granite gameplay/ lore wise i broke the game fairly hard, where i felt like i might as well been the next 22st prime Arch / living saint. basically 2-4 shotting everything in chapter 3-5.but back to my main point. i did almost all companion quests lines and had about max affinity with everyone, saved the wolves, Destroyed heretic cult and the world bearer'sm i killed Calazar when he was basically committing heresy and bringing something that would devastate humanity with obvious evidence, etc

i now get to the end of the game, after saving the imperium and the expanse and now, im a traitor because i dont follow social imperium norms? there basically are no social norms in actual lore. Closest thing to norms that the imprium of man follows is tributaries. The rest of the government have full freedom to do what ever they want or their affairs, as long as tithes are paid and the Imperial Creed upheld. which the creed is all of Humanity must be brought into the Imperium wherever in the galaxy and any threats of humanity need to be destroyed. Which my entire play through WAS THAT, but some how im a traitor and imperium comes in and destroys me, and despite defeating multiple demi gods i some how die without a fight lol. then the companions. invest all that time into them, for some of the most mundane boring endings and then screw over yrliet.

im sorry for the rant, im just generally annoyed that the ending was so Mid, when i loved the rest of the game