1. Advertising before anything has sold
Ads amplify. If nothing has sold organically or through a cheaper channel, paid traffic is the expensive way to discover that.
2. Starting with Performance Max
It needs conversion data to work with. A new account has none, so it spends while it guesses.
3. No tracking check
Launching without verifying conversions against real orders means every decision afterwards is built on a number nobody validated.
4. Ignoring the store review
Google reviews new stores harder. Thin policies and no contact details mean a suspension before you have learned anything.
5. Changing everything every three days
The account never leaves learning, so no week is readable. Why that happens.