Is there a Portable version for Windows? I try not to install programs if that have a standalone portable available...I use the free version of DaVinci Resolve to assemble my 2-up and 4-up videos, and I like it a lot. It's not missing any features that I need, but YMMV.
I ran it on my old Intel-based MacBook Pro, with a discrete GPU, and it too awhile to render out, but editing was fine.
I now run it on my Apple Silicon-based MBP, and it renders out many times faster than real-time, at least for my relatively simple workflows.