At this point I'm completely uncertain whether the issue is hardware, driver or windows caused.
Briefly, I purchased this Type-C Thunderbolt 3 compatible Hub
for my GL502VS, to simply connect my USB peripherals and dongles through it. I didn't want to go overboard with the expenses, this is why I chose this HUB.
The Hub connects to the Laptop just all right, Device Manager shows the Generic USB Hub
and Generic SuperSpeed USB Hub
driver instances activated. The issue is that any connected device functions dodgy, constantly freezing or even completely losing power.
I unfortunately have no possibility to test the HUB with other laptops/PCs, I however checked with a phone with a Type-C port, both my keyboard and mouse worked flawlessly there.
Please let me know whether the Type-C port is faulty on the GL502VS, or if there might be incompatible driver based issues, which interfere.