I’m betting this was done on purpose and sent to you. Not responding is the best response of all.
Besides this obvious childish BS tactic text I picked up on, you seem to expect “normal” from him as a father. Thinking he should be calling his kids and spending every moment of his visitation time with them as if he were a “normal” loving, caring involved father. I think your expectations are very high when it comes to that……just saying.