I’ve been using Limo, on Bazzite, to mod Cyberpunk 2077, Kenshi, and Fallout NewVegas, on a SteamDeck, with 10s of gigs of mods for each … for 2 years now.
Yep, it doesn’t have all the bells and whistles, isn’t as automated as far as auto support for paying to download 100 gig messes of modpacks that don’t work correctly, easily.
Yep, it requires a bit of learning how it works, and yep, a few particularly invasive/reconstructive/substantial mods require weird little work arounds.
But that is basically always going to be the case.
And Limo gives you all the tools you need to put in a bit of your own effort and figure out how to make things work, or identify things that just won’t work.
A mod manager cannot be an easy button, because mods by their nature are made by amateurs, are experimental, are mutually incompatible.
Trying to make a mod manager that is an easy button is a fundamentally doomed to fail idea, unless you think you can come up with a solution to handle every weird thing that ever has been or ever will be done by a modder, for every game, ever.
You would think these Nexus people would understand this automatically, having been doing what they’ve been doing for what like a decade or two now?