The older MediaTek 7921e chipset sometimes works better if you disable ASPM. I have no idea if the 7925e chipset will benefit from using this method as well, but newer models performance can sometimes be improved by testing the same options that help other similar models from the same manufacturer. So it’s worth testing out the fix below to see if it may help with your newer MediaTek wifi model.
Create the wifi configuration file /etc/modprobe.d/7925e_wifi.conf with the command below:
touch /etc/modprobe.d/7925e_wifi.conf
Open the newly created etc/modprobe.d/7925e_wifi.conf file in your favorite text editor and copy/paste the contents below into the configuration file:
options mt7925e disable_aspm=1
Save the file, then reboot.
If the new driver options file does not help then you can delete it afterwards.