@Haunt88 I think you missed the whole point of my discussion. Saying that "switch their parents or scenarios and situations and it would be the same but with Shizuka as your answer" is not correct answer, especially in legal system. Imagine, a guy kills another guy, but judge says "I am sorry for you, if you switched your environment, you wouldn't have done this. Therefore I shall not sentence you.", this would be embarassing for having such judge.
I am not denying that Shizuka COULD have done the same as Marina. But there is reason why I chose OG timeline, because it is closest to reality. And in such reality, Marina was the child (because of domestic violence) who bullied, used violence and Shizuka was the one who use manipulative seduction. We can completely replace the names with A and B. But the answer for me is still the same, A despite being domestically abused, caused/initiated pain to others. Because A is of child age, therefore should not be held accountable for this. However, if any person of adult age did the same thing, it should be inexcusable and should be held accountable, EVEN regarding the environment. That is why the legal system is established in such way.
Now you saying the children are mimicking their parents is half true. Yes, parents are to blame for the most and has big influence on kids. But you are implying like the children are complete copy of their parents, which I disagree. Because this is completely disregarding the individuality of the characters shown in the anime. Shizuka despite mimicking her mom's manipulative side, still chose to treasure and love the doggo. In Takopi's timeline (although I said to keep within OG timeline), she is seen to be capable of violence. Both of these traits, establishes her individualism and not copied from her mom. The same applies for other characters. So back to my original statement, that Shizuka COULD have done the same thing as Marina, but also has probability of not doing the same as Marina. It all depends on the core nature vs nurture of the person. A person's response to domestic abuse, can be two folds, one is to repeat the cycle (NURTURE), one is to stop cycle (NATURE). So all in all, yes, IF ANYONE DID the same thing as Marina, and they are of adult age, they SHOULD be held accountable, it is just an unfortunate case that Nurture won, but the sentencing should be still done.