Caporegime
Empyrion which is not optimized but still with this set up should be quicker that 8 year old 2500k cpu The other game I tried was shellshock which I always got very high fps. The fact that these games are slow to load as well has got me confused.
According to this Ryzen meets the requirements... http://www.game-debate.com/games/index.php?g_id=21267&canMyCpuRunIt=Empyrion: Galactic Survival
And ShellSock...
http://www.game-debate.com/games/index.php?g_id=24387&canMyCpuRunIt=ShellShock Live
E-Sports like CS-GO and Rocket League ecte... are also not specifically optimised for Ryzen and yet people are easily getting over 200 FPS with Ryzen CPU's in those, its not necessary to have 'optimisations' for reasonable performance, you might want to optimise to get a higher level of performance but even that is mostly not necessary, 'universally' it doesn't work like that.
The sort of performance you're getting, something is wrong with your system, the Ryzen CPU with a fast GPU should be blasting though these games, a mate of mine has a Rysen 1700X with a GTX 1080 he is pinned to the 300 FPS cap wall constantly in any source engine game like Insurgency, CS-GO ecte....