Internet Speeds

Does anyone else seem to only get 1%-2% of the speed they pay for no matter what time of day? Its been going on for almost a year now and all the cox techs will do is come and try to sell me a new router and modem whenever what I have is definitely better than what they offer. (Spent over $1200 upgrading this and keep the technology upgraded every 2 years and I'm sorry but I'm not trusting a tech on modems when they can't answer simple questions about what they are selling).

Like we pay for 150 Mbps down but only get between 700 Kbps and 1.6 Mbps every time I use the cox speed test with a wired connection. And its not even just our house, its the entire neighborhood that is like this. We get spikes of decent internet, but for the most part this is it.