Anyway, I've never used GCE or Azure, but plenty of AWS ;) From my experience, Amazon tends to 'forget' about issues quite quickly. Last month there was a DNS issue, ~12 hours after it was 'resolved' according to their status page I was still having issues for instance.
That being said, I have not had any full outages or downtime due to AWS issues in 4 or 5 years.
Google's network is spanning the globe. Configuration changes are more likely to affect all regions. Google is also better at reporting errors.
This is based on my own experience. YMMV
(Although they keep fiddling with the title, it should just be "Google Cloud Incident", it affected a lot of services)
"Description: We are experiencing a major issue with Cloud Dataflow, AppEngine, Compute Engine, Cloud Storage, Dataflow, Dataproc, Pub/Sub, BigQuery, Networking beginning at Monday, 2019-11-11 01:15 US/Pacific"