Hi jbeat,
Thank you for reaching out to us in our community and welcome, sorry to hear you are getting your expected speeds on your 125 mbps speed, there are so many factors which can effect WiFi from other devices, furnishings, fish Tanks and kitchen appliances such as the Microwave, there are some great hints, tips and general WiFi support here including our Connect APP, your speed will also depend on the amount of devices connected when using WiFi..
Did you do a speed test as advised above, if so what speed was hitting the Router?
Regards
Paul.