Totally agree with what @Pinkyxx and others have said on this thread.
OP, hand hold, sending solidarity. It’s horrible when you know your DD is anxious and upset, and not have your ex on side to deal with it.
I’m in a similar position - DD has been 50/50 since she was 2, when exH and I split up, and I stupidly believed that she’d be ok with this, as would never know anything different.
From the age of 6, she’s wanted to live with me (wanting EOW at her dad’s).
EXH refused to make any changes at all, and poor DD had anxiety, developed a twitch/tic, slept badly, cried all time time, told teachers she wanted to be with me more (school had to put in place a special routine to help her cope), child psychologist etc.
ExH simply refused to believe that she was so upset, telling me time and again that she was only upset on the day she went back there.
The threat of going to mediation and court were the only things that eventually made him back down to 60/40.
Fast forward another 4 years, DD is now 10, and the narrative has never changed.
She doesn’t feel emotionally secure at her dad’s, constantly asks for things to change so she can be with me more, and is now displaying the same anxieties as before.
She tells me she’s too scared of her dad to tell him how she feels, and cries herself to sleep whilst at his house.
He refuses to believe that anything is wrong.
I totally understand the feeling of powerlessness in trying to co-parent with this type of man.