I'm so sorry you feel this way. I bought the whole Miquon series and have yet to use it. We also tried Singapore and did not like it. We have finally found our place with Christian Light Education. It is straight forward, scripted, and provides plenty of drill. We love this program now. It is inexpensive as well. You could order a tm and couple light units to give it a try.
Either way, deep breaths. Your child is 6 1/2 and only in 1st grade technically. You have not ruined your child at all. If you don't like Miquon, sell it. Then, start looking at others. Math does not have to be flashy, new math. It just needs to get done.
Hugs!