Yes, the hate others have for Erin is somewhat exaggerated but I totally understand why Henry is acting that way towards her. She lied when he asked her where is she and y'all can't blame Henry if he thinks Erin is still in love with her ex after seeing the ex kiss her gf and her gf lying to him about it. They just really have to talk it out and make things clear before things blow out of proportion.
The way Shin overthink things and then Chief just blurts whatever that would make the two flustered I CANNOT WAIT FOR THE NEXT CHAPETERS <33