Commenting from my alt to avoid doxxing myself. Have spent over a decade in various 'large' streaming video companies, the ones you absolutely know about today.
DTAG is bar none the worst ISP to work with. Everything they do is politics, they may decide to 'forget' to increase the bandwidth on a PNI until you take a meeting with german regulators. Almost every other ISP views PNI as the best way to uphold customer satisfaction without breaking the bank over a more expensive IX and will happily add ports when needed, DTAG on the other hand often requires concessions and selective agreements with a lot of strings attached.
I don't think Germans realize just how much DTAG is holding the experience back for end users (given it's partially state-owned)
Cloudflare has a speed test. Try comparing it to other speed tests around the same time. Should reveal if Dtag is congested/throttling your traffic to Cloudflare sites vs others.
Could also check the official Breitbandmessung by the BNetzA
They also have some interesting statistic by provider, etc. on there. https://www.breitbandmessung.de
They tried to install it to our home too, but our landlord just didn't do anything to help them to open doors and now we've been soon waiting two years for the connection.
The more I read about DTAG the happier I feel like using our cable connection which, upstream excluded, works quite well.
We're about to buy our apartment in Berlin and that changes things. I hope we have soonpre choice on the fiber operator.
As a german I hate DTAG with a passion for many many failures in throttling and just for the most expensive prices in europe.
I just hate Vodafone more which is a hard thing to achieve but there are no other options in most cities.
DTAG is bar none the worst ISP to work with. Everything they do is politics, they may decide to 'forget' to increase the bandwidth on a PNI until you take a meeting with german regulators. Almost every other ISP views PNI as the best way to uphold customer satisfaction without breaking the bank over a more expensive IX and will happily add ports when needed, DTAG on the other hand often requires concessions and selective agreements with a lot of strings attached.
I don't think Germans realize just how much DTAG is holding the experience back for end users (given it's partially state-owned)