Yes I noticed that but wasn’t sure. Now you mention it, it really seems that Telekom is in charge of the misrouting. I‘ll also ask some friends to traceroute from their homes and then I’ll sent a complaint to the Bundesnetzagentur (hopefully with some evidence), too.
I’ve had the same problem with our website loading super slowly over the last few months. Just like @muxelmann, we then switched to the CF Pro plan and the loading times normalized immediately.
Now comes the interesting part: we switched back to the CF Free plan after 1 month and: The loading times remained fast! It’s now been 2 weeks since we switched back.
$25 very well spent!