Are you sure it's the FA flavors that you're finding to be unpleasant, and not the nic/PG/vg that they're mixed with?
Also, Flavor Art is not a Chinese company, they are Italian. Incidentally, Chinese juices are not inherently "bad" or inconsistent, in my opinion/experience...some of my favorite juices are made by Dekang.
Anyways, just because the particular RY4 and cherry you have tried don't seem good to you, it doesn't mean you won't like ANY RY4 or Cherry...those flavors can vary tremendously in taste depending on the maker...so, don't be discouraged by your experience.
And the "medicine" smell you describe could simply be residual alcohol from some flavoring or another, sometimes letting a bottle of juice sit overnight with the cap off gets rid of it...there are a few juices I use regularly that need this treatment.
You could try Madvapes Top Vapor Cherry Tobacco for a decent cherry flavor...as for RY4 there are so many, so soooo many, lol...one of my favorites is VR4 from Vaperite. Everyone I've ever let try it loves it, so odds might be good that you'd like it too.
Good luck, you'll find something you like, I'm pretty certain.