Democracy is great we can elect legislators that enact laws that align with our values. The trick is making sure that the "law enforcement" actually does what it says on the box and simultaneously to punish overreach of law enforcement the same way we punish any other crime.
Not really, though. Here in US, most of the time, best case is that we can elect legislators that won't enact the laws that horrify us the most (but they will still enact plenty of nasty stuff).
This can pretty easily be solved by younger people voting more and enacting ranked choice voting. America is so cool because nothing (except maybe the bill of rights) is set in stone, we can change how it is!
With respect to ranked choice, that would certainly help a lot, except that both parties by now have realized that it is a threat to their dominance. You kinda expect that from Republicans, but there have been a slew of pieces critical of ranked choice and basically everything other than winner-takes-all from the left as well lately, accusing it of being racist etc.
All in all I think its important that we as a society bring more people into the political conversation. I want conservatives and liberals in the same room disagreeing more. I think that would help more than any other single thing.