Thanks for posting and a warm welcome to the community.
I'm sorry to read that you are experiencing slow broadband speeds.
From checking your connection, there is a high peak time traffic fault in your area which is causing slow speeds. The reference number is F004846397 and with a review date of 8th March.
As this will impact your connection during peak hours, can you complete speed tests at different times of the day whilst the Hub 3 is in modem mode please? This will eliminate other devices connected and I would like to see if there is a difference with the speed results.