Time to start homeschooling. Post a note at the library if and other parents want to start a co op with you. Sit down with you child and take notes about what he thinks happens at school. Another possibility to to invite some older kids to have a homework club at your house.

As for parenting ....it is normal to make lots of miscalculations. That is how you get more data. Your kid looked ready before the experience but doesn't look ready now. See?
G

Coaching available, at SchoolSuccessSolutions.com