@kawaiinekololis You could make a list of servers, along with metadata (avg. players, staff activity, anti-cheats), but that seems difficult to maintain.
im not an admin, but i think you can try enabling Criticals and set it to "Packet" mode, not sure if it'll actually help though.. (the packet mode worked strange for me in general)
No. That version of LiquidBounce is discontinued and cannot be downloaded. You can find the newest version of LiquidBounce here: https://liquidbounce.net/download
SOCKS4 is not supported. And clipboard is probably not the correct format, just type in the SOCKS5 manually. Also make sure the proxy supports Minecraft which is usually not the case with free proxies or even most paid proxy provider. If you look for a good proxy provider, use our own service https://liquidproxy.net/