... or you can change to "Ciphers chacha20-poly1305@openssh.com" in your ssh server to use chacha20-poly1305 instead of heavier AES.
or if you haven't disable it, try changing orders in putty's Connection -> SSH -> Cipher and make chacha20 be the first one.
but Kex can be slow (or very slow) if you're using a very long DH key, ECDH key can be faster.

Azami wrote on 2022-02-09, 02:55:

Hi, […]
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Hi,

Since I believe my port is now fairly usable, maybe I should post it here.

Short version, it's available here, with binary builds for convenience:
https://github.com/Toyoyo/putty-win32s/

Do you moved away from github? Not only your github repo is now 404, and also your username.