Are you kidding? I run a full node on my Core I7-4790k 4.0ghz, use it daily for other things, including games, video editing/conversion and check my wallet data periodically and had no problems. So what is your issue?
Periodically? Are you sure you are not running a non-listening node? Mine eats up over 1 TB of bandwidth per month very easily and I can't possibly imagine running the node on the same system that I use for work (not even with the current block size).
I have no idea of my bandwidth (don't check at all) as i have optic fibre in UK and not some crappy telephone copper wire that other internet services provides. Mine has no cap at all, unlike other internet services. I download all my favourite TV programs as i don't have 18 to 20 minutes per hour to waste on watching adverts. My network traffic on my wallet shows the usual download of new blocks but sending out more, roughly 1gb daily. I have the usual 8 outbound and on average 5 inbound (tends to fluctuate as my wallet auto banned some inbound connections for some reason)
Based on my experience, i can not fathom why others are complaining.