@everyone
Thanks for all the input. I have decided to shop for a switch to replace that old tp-link.
The switch that caught my attention currently is the Ubiquiti EdgeRouter X.
Here is de datasheet of that device:
And also already found out how to enable offload on that thing trough ssh. It should be able to reach around 920Mbit.
I guess it's decent enough for a device that's around €60.
The PoE is a nice bonus for that price 