That's terrible from Apple. They don't want people to enjoy good quality resolution in cheap Monitors. I found a fix for that https://www.reddit.com/r/MacOS/comments/sqwsh5/comment/k9nuaxq

They're never gonna fix it. I found a good solution involving a free open source library. https://www.reddit.com/r/MacOS/comments/sqwsh5/comment/k9nuaxq