* I've had customers get their cloud accounts shut down for a literal three cent billing error,
* I've seen people who use Google for advertising pay thousands of dollars and suddenly stop getting their ads shown,
* I personally ran a website with Google Ads, and the first time I tried to cash out was accused of click fraud and had all the earned money stolen,
* I've had product managers for GCP lecture me that I shouldn't be using "preview" services (despite services being in preview for years), and then tell my I should have used a different service . . . that was also in preview.
One of my more recent startups was actually funded by a Google based venture firm, and they wanted to know why we refused to use GCP. My answer is that I wanted the startup to actually succeed, and it wasn't worth the risk of dealing with Google's horrible support.