The reality of air law is that most of it is a memorisation exercise for stuff that will never be used. For example almost nobody can remember the various cloud clearance distances for various heights and speeds below/above 140kt in different airspace classes. If you are VFR then most of it is irrelevant, and if you are IFR then even more of it is irrelevant
The stuff you really need to know is practical flying issues like Class D or above needing ATC clearance.
The Confuser does the job very well because it contains very similar questions, and has about 4x more questions than the actual paper. So if you get a good score on the Confuser you are sure to have picked up enough stuff to do well in the exam.
There is no point in criticising the Confuser, versus swatting it up from a Trevor Thom book. Both are just learning aids.