> Most of the time, when we debugged why an ad wasn't showing conversions, rather than anything inherent to the ad, we found that it was the flows the user encountered _AFTER_ landing on the platform that made the performance suffer.

This 100%. When picking a VPS I signed for 9 options. In the end I went with Digital Ocean, largely because of their simple onboarding. Yes this is a one time process, but to me it's a critical one. Get it right.