Narekatsi
Oriental Orthodox
I do think you mean window manager rather than distro here, but will say a bit more below.
I meant both. Sometimes some distros will introduce their own functional tweaks to a certain window manager, so I was covering both bases.
Your problem is likely that you're using the discrete GPU & ignoring whatever on board performance GPU your laptop comes with.
No discrete GPU in my laptop.
I finally had the chance to try the latest Plasma desktop version as part of the KDE neon distro, and I think they nailed it! Over 90% percent improvement. I can scale in 5% increments, and whatever value I picked, it didn't introduce an instant headache. So there is hope with Plasma 6, I'll just have to wait for a more stable distro to bundle it, as KDE neon breaks things here and there with their latest rolling updates.
Thanks to everyone who chimed in.