There is a pretty good resource where you can find free proxy servers. On the site you can choose the right options for your needs, and they provide different locations, which is quite convenient. If you are interested, just go there and see if you can find what you need: https://gologin.com/free-proxy/

I read somewhere that free proxies suck, and you shouldn’t use them at all because they’re just a waste of time and nerves.

Listen, yeah, the problem with free proxies is mainly their instability. Well, that’s what I think and I noticed it myself from my own experience. On one hand, if you need a proxy just once, why pay? On the other hand, if you have serious tasks or you work in fields like here where stable work, no crashes, no lost settings, no slow speeds are needed, it’s better to pay for a proxy from a good provider and not stress.