I second you. My main dissatisfaction is the U-turn in Swayam's character, which is very unlikely, no matter how harsh the circumstances are. Also as you said, he is not shown doing anything to solve his sister's problem and only getting angry on Sharon.The original calm and smart Swayam would listen properly to her, make her understand the situation and help tackle with it.
Talking about consistency, current taarey is not convincing to me, due to the fact that Rey is falling for Taani knowing she cheated on dance video, behaved like Kria to attract him, ditched the team and haven't told the team about the video cheating yet. Also it seems to me that Taani is not guitly for what she did to the team. Rather she is sad coz Rey found out her truth.
Guys this is my point of view. This has nothing to do with the actors. I am only commenting on the presentation of the show.