Most evaluations from 3p sources like Gartner put Amazon a nose ahead in a virtual tie with Google regarding uptime and reliability with Azure pretty far behind. The latest numbers I saw were for 2018:

AWS - 99.9987

GCP - 99.9982

Azure - 99.9792

Source: https://www.geekwire.com/2019/microsoft-may-cloud-computing-...

There's a huge anti-Google groupthink here and negative news about Microsoft seems to be pretty muted.