Apple Maps has come a long way since its disastrous initial release. For about a year now, I have rarely used Google Maps. I typically find Apple Map's routing to be just as effective, even for avoiding traffic, accidents, etc.
Back to waze i went.
Once you do so, you can select the wrong turn/other problem from the list of steps and describe the problem.
I'm no fan of Apple but I'd hardly call it's release disastrous.