It could be a case of too much cooling, while simultaneously being too much heat.
If you’re blowing so much air that the filament instantly solidifies when it leaves the nozzle, it’s not going to bond with anything else. It’s also interesting that the first layers are fine (when the part cooling fan is typically not running), but problems start when the part cooling fan turns on.
Have you tried without part cooling at all? Another thing is that your part cooling might be cooling down the tip of the nozzle, causing tiny partial clogs, which are cleared every so often by friction.
I'm someone who builds cloud infrastructure for a living. I only touch AWS (Amazon), but the same applies to Azure (Microsoft) and GCP (Google).
Kagi is private. Saying that they "rely" on Google because they use GCP is akin to saying that the US Army relies on General Motors because they use Hummers. It's just a provider. They're renting virtual machines, compute power, storage, and network bandwidth nothing more. You can use GCP/Azure/AWS without your data ever being visible by GCP/Azure/AWS. It's not because you use GCP that you have to use AdSense/Analytics/Fonts, etc. They are completely separate.
Politicians would have a field day with all the cloud providers if using one thing forced you to use everything.