I'm not a terrific player, and only play for maybe 10 hours a week. So I've only gotten to one weapon trial, for the Flatline, which is the only must-have weapon for me really in the game. There are lots of other weapons I like as a secondary, but I'll almost always end up with a Flatline in any BR game I play. When I got to the level 20 challenge (20 kills while ADS) it was like, haha yeah I think I can manage that.
Some of the trials are really silly, and while I won't make fun of them, I'm not gonig to go out of my way to try to finish them. But I like that it gives people who take the game at very full-on try hard seriousness something to aim for.