The Oak family make me so mentally ill actually
Like, for starters, the generational trauma that cannot and will not be shaken off:
The very obvious first point is The Doodler. 'The Curse of The Doodler' passed down from generation to generation. Even after Lark and Sparrow release it, the curse still haunts them as the apocalypse they have to bear the blame for. Now Dood is walking amongst them, as a teen protected by the teens, and all Lark and Sparrow can do is look him in the eye (not even really). Lark wants to end this generational trauma by killing Dood but Normal wants to do it but helping it (parallel to what we see happen in s2 ep23 when they sit on the Throne).
The next obvious ones are the veganism (has been an Oaks thing since Hildy's grandmother, if not great-grandmother).
and the 'shoes on' household. Something Henry started due to always being barefoot in Oakvale cause of Barry's Rules. Something that is still instilled with Normal and Hero.
All of the Oaks have a dislike towards their kids/parents. Hildy hated Barry cause he abused her for so long and in the final years of her life he abandoned her in Oakvale and left her to die. Barry and Henry fought constantly, Barry creating more Oakvalians cause Henry would never have been good enough for him. Henry and Lark straight up just do not get along, especially after Henry took the Gauntlets of Ogre Power (which in Lark's eyes caused Walter to get injured and almost caused Sparrow to die), ESPECIALLY after Henry pulled to rogue card. Henry and Sparrow don't talk anymore which is something I will get into later on. Lark and Sparrow weren't even Henry's favourite kids, it was his pet bird Beanie. Honestly, I'm kind of scared to see what Henry and Birdie's relationship is like. Then we have Sparrow and Normal. Sparrow is open about being not being proud of Normal and wishing he was more 'normal'. Finally we have Sparrow and Hero. Sparrow probably isn't that proud or happy with Hero either since she just noped out of being the chosen one. (check out this post)
Another kinda obvious one, the (very strong) family resemblance. They all look so alike, so similar, of course they're going to be the least likely to change and break tradition. (post)
SPARROW AND HENRY NO LONGER TALKING - so many implications. Like, is it because of the shit Lark and Sparrow pulled with Hero? Cause he married a centrist (/j)? Was it because Sparrow (potentially) used the memory syringes on Rebecca to keep their marriage in tact(more in a bit)? Some other reason which we will later find out? Is it why Sparrow can no longer turn into a Love Wolf? Or the final straw as to why he can't?
SPARROW, REBECCA AND THE SYRINGES - So. In s2 ep18 when Normal asks Sparrow if Rebecca knew about all the Doodler stuff, Sparrow says "Your mom doesn't know… about what's going on." ... "that's kind of how we… stayed married." Later, we get to know, from Hero, that Rebecca did in fact know what was happening - that she was involved in what happened to Hero when she was younger, "mom and dad, just sort of looked at me as like, the golden child. They weren't like with me, they were like demanding things of me." So potentially, Lark and/or Sparrow used the syringes on Rebecca cause she threatened their marriage over what happen with Hero. (POST)
Speaking of Hero's childhood - Other than what happened very obviously traumatising her, "they showed me a glimpse of the Doodler for a second and I cried for 3 weeks straight," it also very heavily strained her relationship with Normal: "I feel like things have been choppy between us for a while" ... "It felt like I shouldn't befriend you, cause I knew at some point I'd have to like, sacrifice myself heroically and I didn't want to make you lose me in that way, so I felt like 'I should just keep him at arms length.' " It is suck a stark contrast and parallel to the (toxically) codependent relationship Lark and Sparrow have
HENRY - The fact that Henry is the last of the dads that is alive is so depressing and so expected. He has elf blood and is a high level druid, of course he's still alive. He is (most probably - we don't know the situation with Mercedes and Birdie) alone, all of his closest friends are dead, his sons don't talk to him and because of that he probably hasn't seen his grandchildren in ages either. If something happened to Mercedes and Birdie and Henry is truly alone, there are parallels with Hildy's final years (this post and the tags)