I only see this hurting smns and maybe schs though I haven't experienced this bug myself(or I haven't noticed it). for every other job you should only need 2 crossbars in which case using the option to hold both triggers to access a different set is all you need. if you really want to switch sets you can tap r1 at 3 o-clock in terms of the GCD timer. don't use pet hot bars btw just put pet commands along with your spells on the same crossbar. be sure to enable auto hotbar switching when drawing/sheathing weapons and to check the boxes accordingly. I may have missed something but be sure to exhaust all options before you deem the game unplayable. I also recommend looking up a youtuber named "epic reset gaming" he has crossbar guides that are slightly outdated but extremely helpful.

I play mnk,drg,pld, and war without trouble (and no macros!) with 2 sets and I've never had to actually switch sets since R2+L2/ L2+R2 was added to the game. all of my main attacks are on set 1 (along with anything I tend to forget about like awareness heh) and buffs, jumps, markers, anything defiance related on set 2 which are all easily accessible when holding both triggers.