I never really had a problem with her in season one. I liked that she had issues which drove her reckless behavior. It made her far more interesting than female Autobots usually were. Her having two tragic backstories was pretty redundant, and was likely spawned from their desire to portray Screamer as a threat (despite that being something they dropped in season two) and that members of Team Prime could die (something they dropped pretty much immediately) while also introducing Arcee's rival later, meaning they'd already killed Cliff off, just so she could be separate from the 'Cons (despite them having no idea what to do with the rogue spider). However, I never truly minded that. It actually made things a bit more tragic, in my mind, as it seemed every partner she had was fated to die. Then, she finally saw the error of her ways in the episode Partners, when she saw Bee's horror when she was about to kill Starscream, and later when she realized what her actions had cost the Autobots. Then season two happened, and rather than continuing the lessons she learned at the end of season one, and getting over her dead partners, she instead just went right back to behaving the way she did in season one. It was annoying, because if she wasn't going to grow as a character, it became pointless caring about her issues. What happened there? When the producers said she should get over her partners, did the writers think they meant she should get over the episode Partners, and wrote her ignoring the lessons she learned in that episode? Plus, the ending they gave her story in season two was botched horribly. She chases after Airachnid, again, gets into a fight with her, then when Airachnid accidentally traps herself, Arcee claims she showed restraint, despite having every intention of killing her, and never learning to stop abandoning her team for her revenge quest. Then later on, she actually berates Smokescream for not being a team player, turning her into a hypocrite. Also, whatever happened to her being the main character? I swear she was in season one. Then she suddenly became a side character in season two, until the crumby ending to her story, after which she was completely pushed to the background. They didn't even bother replacing her until Smokescreen came along, and between the end of season one, and Smoke's introduction in late season two, the show didn't seem to have a main character. Then it happened again, after early season three, and Smoke became a side character, until the season finale, where they suddenly decided Bee was the main character moving forwards.