I wouldn't say the web of trust aspect is broken but non-scaling personally. Key servers and others are "compromises" in a way that can lead to being compromise

I wouldn't say the web of trust aspect is broken but non-scaling personally. Key servers and others are "compromises" in a way that can lead to being compromised. If you don't have an effectively auditible trail of knowledge to be able to tell if someone attempted trickery then it doesn't serve the full purpose - but that doesn't scale well.