He ordered the 2 orphans being burnt alive
Yea Theon crossed the line there. He garners some level of sympathy from despite this and betraying the Young Wolf mainly cuz he was manipulated...emotionally and cognitively mindfukked by his piece of shyt father and his judgemental sister. At least she's still showing she loves him, but his pops is still all
about his return and subsequent capture. He grew up a ward of the Starks, an honorable family who likely made it a point to never shyt on his pops to him. So he grew up thinking it was one way, then found out it was another and it rocked his whole existence. He was suddenly forced to choose between his 'brother' and his real family. I can't really fault him too much for choosing family over everything, but it was clearly the wrong decision. A decision that sent him down a terrible path of certain doom, cuz even after his choice, his father still treated him like a b*stard step son.
Jamie is just a bytch ass muthafukker thru and thru....no excuses for him. He comes from a major house, the wealthiest house, and has been treated like royalty since birth. However, from stabbing old men in their backs to pushing the children of the family that welcomes you into their home out of windows, there's nothing that this smug fakkit won't do