Your son's remark is important, I think. She is not respecting their relationship with you and that's a big no-no to the courts.
I would ask through the L's that you both attend parenting classes, and focus on expressing your concern about the impact it can have on the children that she doesn't think they should be with you equally.
Have you read about parental alienation? It can be subtle or blatant, and different states have different legal definitions and consequences. There's a lot of good info there about it.
There's a website for fathers - https://www.deltabravo.net/ - that we used to recommend. You might find some interesting info there.
Best of luck on preserving your custodial time!
I had to smile a little when I saw your comments about perfectionism. I'm struggling with that exact issue and I know that it contributed to the breakdown of my M. It's great for work, though!
So through a neat twist of fate, I have met someone who confronts me about this because of his own experiences in a M. I'm working on accepting myself as a flawed person who can make mistakes and not feel shame about it. And you know what - people like you better when you do. They think it's endearing and it makes them believe that you're human, just like them.
I had an extremely interesting experience last weekend. I was up a lot of the night between Saturday and Sunday, journaling and thinking about this, after noticing my own reaction to some things that were 'imperfect'. Guess what the homily was about in church on Sunday... our struggle for perfectionism and how it actually interferes with our relationships with other people and with God. Sometimes the Universe answers us very loudly...
M 16 yrs, WH62, P54 3 adult blended kids EA 11/13, BD1 6/14 PA fall 14, BD2 2/15 Piecing 2015, BD3 12/15 Separated 4/16 WH moved OW in 5/16 Divorced 6/15/17