TLS’ only issues aren’t just CAs being a mess, it’s also an anachronistic protocol that just isn’t how you’d design something today. 1.3 is better, sure, but it carries tons of legacy garbage and most clients still have fallbacks and logic for it.

I also dislike QUIC for being a lazy, poor version of TCP. Middleboxes suck sometimes but sometimes do useful things (eg on a plane TCP is terminated before it goes to the sat, improving latency and throughput compared to UDP things with retransmissions, middleboxes can use MSS clamping to avoid fragmentation, etc). QUIC largely failed to consider these things and just said “screw all middleboxes” (compare to eg tcpinc which got similar encryption properties without being lazy). QUIC exists to rebuild TCP in user-space cause kernels sometimes suck, but for those of us with an operating system newer than five years old that’s not a problem we have. Worse, sometimes your OS has specific useful features (eg MP-TCP) that you don’t want twenty apps to have to rewrite. FFS this is literally the point of having an OS! The only promise QUIC made that isn’t as trivial in TCP is FEC, but they gave up on it cause…I dunno why.