Xfinity Pods are slow

I purchased three pods several months ago to help the wifi in my home for my kids in-home schooling. The pods didn’t work well with very slow download speeds. I had a tech come and move a new modem to a central location. The pods are still extremely slow. I’ve been told I should expect speeds of 200mbps by Comcast agents. The speeds are an inconsistent 30-60mbps. No matter how many times we reboot the system, and agents have tried several times, the speed is awful. Is there anything that can be done? The pods have been a terrible investment in money and time. I’ve been a customer for more than 30 years and have never been more disappointed.