It is critically important to control your anger right now. I channel mine into proactive action. Some will go to the gym and beat up the punching bag.
Do you have any messages between you and W where she AGREED to time with your children. I use this as starting point.
Do not fight the supervised visits. Embrace it. They will be your witness that you are safe.
Same with therapists, etc. If you are safe, they will be your best supporters.
Any concerns I had, I would just get the therapist recommendations. MsR2C would get pissed!
I am not sure, But I believe you can get the police to accompany you to the house so they can observe you seeing your children. Even if it is just a 5 minute hugging session.
Always have someone as a witness. Not the children. The more athority and neutral the better.
"What is best for my kids is best for me" Amor Fati Link to quotes: https://www.divorcebusting.com/forums/ubbthreads.php?ubb=showflat&Number=2879712