If you are willing to and want to pay for it, you can try to test it up againts RedFox AnyStream Plus.
Does not cover Channel4 or Peacock though to my knowledge, but it does cover the basics that can be used world wide without using VPN.
Then you can stick to that one instead if you fell like that it performs better.
Per K
I have that program and just tried disney over there. I am getting good speeds with them. Just downloaded a 20 minute episode in 51 seconds averaging 17-20MBPS. The same one on streamfab took 46 minutes!
Thanks for the response. I completely forgot about disney over there. I'm so used to using amazon & hulu on that platform. Thank you for the reminder! It still doesn't excuse the slowness here at streamfab. But as many have said before, I am wrong and it's my fault for my network... uh, ok, sure it's not streamfab... Interesting it works well in everything else but again, it's my network having the issue LOL. I design networks for a living, I think I know what I'm doing.
Full scale version of this image here: