I have a time warner cable subsidary as my ISP.

I started noticing throttling from my carrier about 2-3 months ago. I blocked 2 common CDN access points and everything just went so much faster.

https://www.drivereasy.com/knowledge/youtube-running-slow-on...

I still had hit or miss issues every so often and get throttling, but I noticed it was substantially less over time. This might be purely ancedotal though. But the only issues I had were youtube throttling, I ran speedof.me tests during this time and its been fairly consistent