Those little assholes who code the web interfaces for the provider specific router. You also can't replace it with a fritzbox or something similar.

1. Password field only
2. Password field is no password field
3. This red internet thing doesn't tell me what's fucking wrong
4. The "diagnose" says everything is alright with my internet
5. It always complains because not every device in my network supports gigabit yet (there is an old switch). No reason to show everything in fucking red imo.
6. The things it lists I have to check can be and also should be checked by the fucking thing itself. Like wtf. They wanted a lot of money from me for this shitty thing and there is no temperature sensor to check if it's too hot.
7. It just stops working on hot days... Restart manually solves it. Let's restart manually from work when I have to access my files on my NAS from fucking 40 km away..

(see comments for more screenshots)