I use MO2 with Lutris. NXM Link Handler does not function in my experience, but you can just manually download the mods and then install via mo2

UT has been garbage for some time. I reckon the data it uses to send your info back to them and to load ads, bogs down the network, especially on slower networks. The last time I used it, there were also graphical artifacts all over. Qbit on the other hand, is much cleaner and simpler to use, and it doesnt add any unwanted network traffic, which is why it’s probably faster