You can use a software called LittleBigMouse to make this better. It's really nice in my experience with 2 1080p screens and one 4k. All roughly the same size
I switched to Wayland and it makes a huge difference. Pulling a window over to my higher dpi monitor makes it go ... clearer. It looks just like how you'd want it to look.
I like it so much I refuse to accept my status as chaotic good and want an exception for chaotic good wayland users with correct dpi compensation to be categorized as chaotic neutrals and lawfuls