Can someone tell me why

Can someone please tell me why for years everybody hated Melissa so fiercely? I’m watching Jersey from the start for the first time, but I have watched the latest season. From the latest season I’ve watched and girls trip Melissa seems great, fun, and like she really tried with Teresa. Shes just interesting and overall a great housewife. And i’m confused why everyone makes digs about her bringing nothing. So I’m watching from the start and so far I’m on the start of season 4, and my high opinion of Melissa still remains. I also know what’s happened in upcoming seasons because my friends have talked about it. So I don’t see why everyone hated Melissa for so long and are only now finally coming around to her. Teresa says nasty things constantly about everybody and the feud was originally between her and joe so i’m confused. Why did so many people hate Melissa? Am I just deillusional for seeing Melissa’s side? Some explain all this to me please because I’m just baffled people hated Melissa for so long, because to me it’s really clear Melissa hasn’t been the nasty one.