I think Charlie’s actions in S3 were bad, but not for the reasons you think.

Many people, both in universe and out of universe have pointed out how idiotic and damaging Charlie’s actions were. The problems with what she did hardly need pointing out.

My issue is that she already did shit like this in S1 and has learned nothing. She caused Angel Dust to have the shit kicked out of him by trying to “help”, and she realized what she did afterwards and apologized, and still learned nothing from that experience.

It’s not really a good character arc if she’s not learning from her mistakes even gradually and just keeps making them.