Court/Co-Parenting Advice

To make it short and sweet, my oldest, K, his father acts like a freaking child when it comes to co-parenting. He hasn’t been communicating at ALL with me when we exchange K, and it’s been getting worse. He only has him once a week 9-5 on Sundays. Today he got out of his car, let K out, and before my fiancé and I were even in park, he was pulling out of the parking lot and just left K standing there. Mind you, we exchange at a gas station next to a busy road not 15 feet from the parking lot. K is 3yo, 4 in December. My fiancé about jumped out of the truck to grab him, and I jumped out yelling K’s fathers name, also yelling “what are you doing? Can you please talk to me?” as he was driving away...and as he was driving away, he was flipping me the bird. Mind you, I haven’t been with K’s father since K was 8mo. This has been an ongoing issue the past two months, which I have well documented with my lawyer, but I emailed my lawyer literally minutes after this happened and also told him I would not be sending K again until this issue is resolved. Why he’s acting this way? I have literally no clue. I’ve done my part and always remained civil for the sake of my boy. This is a whole other level of furious I am at though. Is it wrong of me to not let him go back with his father until this is resolved? I don’t know what to think or how to feel besides fucking angry. I’m still waiting to hear from my lawyer but just needed some opinions or advice. Side note, I left K’s father because he was physically abusive to me and neglected K at 8mo, that’s the day I left him.