Slow download speed

I just purchased a PS Pro.
Right away, I noticed that the software update took a long time. But when I started downloading the game, oh boy. I am getting a wired connection of 5MBit/sec. I am on 1gbit speed.

The best solution I found was to enable guest WIFI to get 15mbit/sec.

I am using Bell's 3000 Hub.

UPD: I noticed that when I reboot my router, the speed is 150mb/second for a minute. Then it goes back to 5-10 mb/s