Thank you guys for your responses.
I tried the TP Link wireless adapter with the Raspberry Pi 4 on both USB slots -> 2.0 and 3.0, with the same result.
So in the end I ordered a Fire TV Stick 4K from Amazon and the build in dual lane wireless adapter works amazing (same room and setup).
For me personally its now the best streaming solution at the moment, because everything works smooth based on Android.
You have the option to use Prime Video or Netflix natively and the codecs support is just incredible (industry).
Its a little bit sad that also the Pi 4 in comparison price / quality is not nearly as good as the Prime Stick 4k for streaming.
Maybe if you use additional Linux tools like Pihole etc on the same device and you have wired connection than its also good option (Pi 4).