I can relate with being worried about not being strong enough while I was detaching. I was determined to not go back because my ex had gone too far and I had my limits. I didn't have boundaries in the relationship and boundaries are hard to enforce later on in the relationship if you don't set them at the onset. Some people will lash out when you set them.
I don't even know what she will do next. I've seen suicide threats, drug addictions/withdrawal and everything in between. I honestly think I'm blind
I would stongly suggest that you get a court order if you have not gotten one because they are boundaries that are set by the court and there are repurcusions if your ex partner crosses those boundaries. My ex was angry and kept changing the switch on, switch off times whenever she felt, the kids need a routine and she didn't care about my work schedule. It sounds like you don't trust your ex partner.
Do you mean that you were putting up with bad behaviors in the r/s when you say that you're blind?