
Here's the sales chart for every comic book in history.
Issue 1 sells. Issue 2 sells less. Issue 3 sells less. Eventually it levels out to a steady number or declines to cancellation.
Releasing new series that may or may not fail at #12 is bad for Marvel? No, it's great for them. They have staff on hand already, they don't need to pay more.
The first few issues are where they make their money. If sales are strong, great. If not, start over with a new #1 and mix & match the creative. Why do you think it happens so often?