So it seems that trying to compete with duopoly isn't working.

Can we assume it is cause there is only few big corporations dominating internet infrastructure in US compared to EU with tons of medium sized and even small business that do it?

I would love some good read about US infrastructure, especially why costs are so high compared to EU?

Which duopoly are you thinking? AWS, GCP, Azure + smaller (still significant) Digital Ocean, Linode?