The internet infrastructure is completely controlled via local monopolies and bureaucracies, and this extends beyond ISPs. The entire DNS and PKI system for example is simply a racketeering scheme for registrars and CAs. In general the internet (from the hardware to application-level) is structured in such a way that is weak to sybil attacks, and this requires central (usually corporate) entities to discriminate on traffic.

EMail is one such example: there is no meaningful way to filter spam, so the peering relationships between mail providers break down unless they each implement some sybil-proofing on their own side. The end product is that everyone is forced to use a provider like Google, and play a corporate-political game to stay in good favor with their peers. This is because there is no spam-resistance on Email application level

We've seen a similar situation this week with a controversial forum called KiwiFarm taken down by DDoS. They need to maintain a political relationship with their DDoS-protection provider, CloudFlare, who also controls a massive chunk of the internet infrastructure. This is all so that there can be a central entity that discriminates on the traffic, as there's no spam resistance features on IP level.

https://secushare.org/broken-internet