before you come @ me, i'm not saying this as a bellarke stan because i've disliked her ever since season 3 and long before becho was a thing
• she knew bellamy trusted her and used that trust to lure him away from mount weather, successfully allowing azgeda to blow up his girlfriend and others he'd sworn to protect
• took over polis in 4x01, violating the rules of the commanders and killing the ambassador who challenged her. their government was trying to be peaceful for once as they recovered from the COL incident and she completely squandered that
• literally tried to kill clarke in 4x01 when she was trying to save roan from a bullet wound (something only skaikru knew how to deal with)
• almost beheaded her in the same episode and only stopped because roan woke up
• tried to convince roan to kill her a third time about 20 minutes later
• ^ annoyed roan by doing all of this and overstepping her boundaries as .... whatever her title was
• dishonored azgeda when she killed illian and cheated at the conclave
• literally slammed bellamy to the ground and said to "put down the weapons or he dies" which she knew would be a devastating toll to trikru when they were merely trying to negotiate a peace treaty
• she has like 3 facial expressions ??? (i get that she's a spy, but other actors have been able to play a similar role with varying, slightly detectable emotions to give their characters more depth. tasya doesn't really do that)
• had the nerve, the AUDACITY to lecture clarke about loyalty in 5x12
• clarke saved her because she knew bellamy cared about her. in return, echo said, "i should have killed you when i had the chance" despite witnessing bellamy's grief firsthand on the ring when he thought she was dead and that losing clarke for good would have had a devastating toll on him.
• betrayed raven by turning in shaw, a fan favorite, and having him get beaten up. she knew fully well that raven had her own plan but didn't listen and forced her to betray him by manipulating her into an impossible situation.
• apparently has proven herself on the ring but we are never given any instances/explanations as to what she did or flashbacks to support that claim?? and she's basically back to her old self now except with a new target.
• immediately took charge in 5x11-5x12 when she had no right to and it really should have been raven, the smartest in their group and one of the ones who'd been there the longest.
• threatened shaw multiple times even though he was their ally and had proven himself already
• literally tried to choke clarke to death in front of her 12-year-old daughter figure and friends without remorse
• tossed bellamy's name around (who is supposed to be her love interest??) like he meant nothing in order to exploit clarke's weaknesses
• she literally said "your friend raven" instead of "our friend raven" to put even more blame on clarke when echo herself did nothing to stop her and shaw from being taken
• betrayal is basically her middle name
watch this video to see some of my points: