Pocketstar
Pocketstar Perhaps you can try to reset Bluetooth, WiFi and mobile connections under settings->system->reset options. (After that you do have to reconnect all network connections)
I already did that multiple times, but to no avail...
Pocketstar It can also be an external problem, did you try to turn off mac-randomization? Perhaps the accespoint handles it poorly.
At home, I do not use mac randomization, but I am confident it would not change anything, worked fine before like this.
Pocketstar If all else fails, as a last resort you can try a factory reset, and then try to connect to the internet before installing anything else or changing any settings to see of the speed is fine on a fresh install, that would rule out alot.
the problem is, that the network problems are mostly app-based, a speedtest gives me the full bandwidth my wifi/my modem can handle and the same with iperf3 in my home network.