I installed it on silverblue earlier this year and it was almost fine except firefox would randomly crash all the time, which was frustrating. Also gaming is a whole mess with nvidia. I miss my AMD card
Not trying to criticize you or anything, just genuinely asking - why is it so much worse to turn your computer off when you're done with it than putting it to sleep?
You can change your bootloader output to verbose and it should give you an idea. Probably a startup process hanging for it's maximum timeout or something.