I had crafted part of a lengthy response, but a certain point, I found myself stopping and wondering, "what's the point?"
You continue to state your opinions as if they are fact. You continue to incorrectly or incompletely cite episodes as evidence. By your own admittance you haven't seen many episodes in their entirety or at all.
For example...
Not one major character didn't continue such romantic relationships they had before the alleged holocaust.
Examples refuting this statement have been presented multiple times:
(1) Roslin didn't continue her relationship with Adar (2x13--Epiphanies)
(2) Lee didn't continue his relationship with Gianne. (2x14--Black Market)
Your argument further comes apart when you try to present alcohol and cigarettes as objects of romantic affection. You describe Kara and William Adama's relationship as if it is romantic, which is patently false. This is not the first time you've presented this theory, either.
You insist that Tyrol leaving Boomer was illogical and shallow. Note that he is ordered to cease the relationship by a superior officer. Note that he does not cease the relationship when ordered, because he is trying to hold onto one of the few things he has left. Note that he does end the relationship after the tribunal situation when he realizes that by continuing to lie about their relationship other people under his command (as happens in the episode) could wind up in detention.
Instead of all this, then, why not just limit yourself to answering the simple questions. What did Tigh say or do about Ellen before her appearance? Why didn't Lee reproach his father? Even if Lee was convinced that Bill would have save the world if the military had listened to him, if Bill hadn't divorced Nameless Mama, she would have been safe aboard Galactica!
Let me add one more---how could the show have Helo running around on Caprica without making the magnitude of the catastrophe stunningly, crushingly obvious? The answer of course is that the show is not really about a rag tag fleet of refugees from genocide. It was about US soldiers at war with inhuman Muslims with demonic powers of subversion.
As to the sudden mention of "Gianne"
in the second season, the point is dramatizing the alleged holocaust. Inventing a relationship two years later doesn't do that. I can't see how you thought it did, so why mention it? As far as incomplete citation of episodes goes, this episode ws really about condemning government control of the economy and showing Lee had the balls to murder a man. Both are really stupid points, so I suppose it makes sense to ignore them, though.
Roslin's relationship with Adar was nonexistent in the mini. It was no longer ongoing during the supposed genocide in the flashback. Most of all, since the salient feature of her characterization in the beginning is that she is dying, it is irrelevant---she was losing everything regardless. That doesn't dramatize the way the Cylons took every one's loved ones away from them.
As to your notion that Bill/Kara's relationship is not sexual (on his part)---you are not a perceptive viewer or reader. You didn't notice the alcohol and cigarettes were a joke about the supposed struggle for survival,---cigarettes "made of algae paste" was meant to amuse
Bishbot.
But the real joke is that
it doesn't help you if Bill/Kara really were father/daughter from the very beginning! Only by BSG's adolescent standards are the only important love relationships romantic ones! Outside the soap triangle of Bill/Lee/Kara, does any other character have any other kind of relationship other than sexual?
In one fashion or another, Tyrol would say to Tigh that "Buddy, practically everybody's dead, we've lost the war, I'm not throwing away the last person I love just because you say so, you fuckers lost the war, how do you think you can keep on giving crazy stupid orders." Another incomplete citation of episodes here---the point of the episode is that investigating the cause of 9/11 interferes with the war effort. The behavior of all the characters is unnatural, artificially imposed to rig the thematic conclusion of the episode. Again, though, it would not be helpful to cite the whole episode.
Let me remind you that a BSG fan smarting off to the simple observation that BSG is too angsty started all this. It is. Beating a dead horse just gets you all gluey, and stuck in a mess of nonsense.