I know that my home connection is considerably slower just from the node I run, as is.
If your node is slowing down your internet connection you could limit the number of connections, or throttle the network usage.
Both of which are harmful for the propagation of the network.
Then get yourself a better internet connection which will be good for the propagation of the network.
I have the best domestic connection you can get in the area (London, UK), and I've tried several providers. To get a better connection, I'd need a business range one. 1MB blocks mean total bandwidths over 150GB per month under normal configurations, and long saturation peaks.
You don't seem to understand the problem, or you are disingenuous and pretending you don't. The problem is that many people would not be able to run such connections and full nodes would be just in
decentralized business range dedicated connections or in
decentralized datacentres. I consider this a problem, XTard-in-chief Hearndresen thinks this is not a problem. Judgement call.