[5G Slow]

Product 
Model: Internet 5G Box Pro2 (<- it looks like this one)
Tariff: gigakraft 5G 250 6/21 i

 

Location: Vienna Badgasse 

Device any (tested on several)
(things I tried: restarting router, having only one device connected per LAN)

usually my ping is better during the early morning but only then (4-  6 am)

 

If somone could give me advice on the slow ping or recommendation for a different model I would be very happy, thanks in advance.
In the link you will find all the data
https://www.netztest.at/de/Verlauf?9a7484ed-8ec7-43d5-893d-1b49c254dffe