Hello, friend!
The HG8145V is a home network ONT. If you are not satisfied with the QoS service, you can seek solutions from the ISP.
As a friend commented, the QoS cannot be set or configured on the ONT.
If you want to get a better network experience by setting up your laptop, you can use the following methods:
1. Place the laptop near the ONT.
2. Close programs or devices that consume a large amount of bandwidth.
3. Restart the laptop and ONT.
4. Update the driver software.
5. Ensure that no power saving settings are imposed on the wireless network adapter.
6. Check whether your laptop is connected to the same frequency band.
Thanks!