I know a guy who works at NASA and he says that Launchbox doesn't work well on his work computer either...
Joking aside, it is a reality that Launchbox has VERY SERIOUS performance problems. This has always been the case and always will be because there is no hope that it will ever change. The developers' closed thinking on these issues does not give much hope that something will radically change in this frontend.
I have €50 Chinese portable consoles with more than 2000 roms installed that run faster than Launchbox on a latest generation PC... It's sad, but it's a reality.
I have commented on it on several occasions in the forum, of course without hope that my complaints would reach the ears of the "bosses" of this project, Launbox is far from being a state-of-the-art, top-level frontend.
Why do I still use Launchbox? Well, like the colleague who commented previously, I don't have the strength to start again from scratch to configure another frontend... but I don't rule out that in the future when I find something that is 50% similar to Launchbox and that its developers make Truly based on the needs of your community, I dare to take the leap into the future.