child support & visitation are 2 different things, usually seen by 2 different courts passed the established date;; so, yes, he can take you to court for not allowing him to see his child;; & you won't look too good if you're "bargaining" with your child;; this is a HUGE misconception with custody battles usually because the court "presents" it in this manner to appease both parties initially;; but neither is a "bargaining tool" to be used by either parent;; you can take him to court for child support, but again, it's usually a different court than the custody, check your child support enforcement agency, check with a lawyer (hopefully you have one);; you will do MUCH better with a lawyer than without...good luck
btw, if you want to voice your ex's "harmful nature", you NEED to have PROOF...again, good luck, this is NOT a fun "game"!!!
please remember the child! treat your ex as well as you would treat a stranger that you just met (respectful);; the better you 2 get along, the better the child, TRULY!!! cuz the kid could CARE LESS about ANYTHING ELSE!!