GCP support is atrocious. I've worked at one of their largest clients and we literally had to get executives into the loop (on both sides) to get things done sometimes. Multiple times they broke some functionality we depended on (one time they fixed it weeks later except it was still broken) or gave us bad advice that cost a lot of money (which they at least refunded if we did all the paperwork to document it). It was so bad that my team viewed even contacting GCP as an impediment and distraction to actually solving a problem they caused.

I also worked at a smaller company using GCP. GCP refused to do a small quota increase (which AWS just does via a web form) unless I got on a call with my sales representative and listened to a 30 minute upsell pitch.