Like the others, I suggest you stick to a distro designed for desktop use (Ubuntu, Fedora etc), you’ll have a much easier time.
If you really want to go with something closer to “scratch made” I’d recommend Arch. Its documentation is killer and you can build a system suited to your requirements.
You should try out KDE in a Live CD. The snapping and tiling features work very well, Windows needs to catch up
My method to get around this is setting up a specific user account for my TV. In the user options you can disable transcoding
I came to Arch for the customisation, I stayed for the AUR
KDE can already do any arrangement of tiling though?
It sounds like this software was made to address a problem that exists in Windows, poor window management options. Although with Win11 it’s been significantly improved.
Have a look into tiling window managers, or tiling add-ons for major desktop environments. You can split windows in all different arrangements without any extra software or splitting inputs.
Personally I’m using KDE and it’s built in tiling options work very well.
I’m not very familiar with that software, what features does it have that you want to use?
I use Arch because it makes installing almost any software package trivially easy via the AUR and if you run into issues, the wiki is there to help.