Use case - trying to figure out why my Steam and Battle.net downloads are not that much faster than dialup, despite my speed tests to fast.com as well as my ISP's own custom speed test are registering correct speeds of anywhere from 450 Mbit/s to an outlier of 1.2 Gbit/s.

OS - openSUSE Tumbleweed, have verified all my packages are up to date as of this post (12:30 US central time)

Steps I've taken

• Tested speeds on other machines on the home network, ranging from desktops running Windows 10 to smart phones to TiVo connections, and all of them are fine.
• Contacted my ISP's tech support and went through their steps, verified that there were no infrastructure problems or throttling on their end
• Tested speeds on downloading over a website (EndeavourOS ISO), that download was just under 30 MB/s.
• Observed that this insanely slow speed has happened across three different Linux OSes (EndeavourOS, Kubuntu, and right now openSUSE TW)
• Disabled power saving on my wireless card
• Verified that the correct drivers are installed, across three different OSes

With those in mind, my wireshark TCP logs are revealing a couple of things -

• No dropped packets
• Many, many duplicate acknowledgements as well as previous segment not captured errors.
• Several retransmissions

I'm not sure what to do, at this point. I'm not a CS guy, I'm just someone who's trying to game and not suffer through telemetry.