Lupul

Reaction is once again a missed opportunity to do the right thing.
 
Maybe it was not a good time, maybe other things happen that could ask for priority in your life. That's fine, take your time and say something when you've had the time to look into it and formulate a proper reply. 
 
If it happens a lot that people tell you you're wrong, looking into it might be a better strategy than saying you already said something about how you're right... 
 
Mistakes happen, nobody is expecting anything incredible. A sincere apology would be good, acknowledging the massive mistake in selling somebody's prototype would be better and then moving on to improving things would be best.
 
 

Reaction is once again a missed opportunity to do the right thing.
 
Maybe it was not a good time, maybe other things happen that could ask for priority in your life. That's fine, take your time and say something when you've had the time to look into it and formulate a proper reply. 
 
If it happens a lot that people tell you you're wrong, looking into it might be a better strategy than saying you already said something about how you're right... 
 
Mistakes happen, nobody is expecting anything incredible. A sincere apology would be good, acknowledging the massive mistake in selling somebody's prototype would be better and then moving on to improving things would be best.
 
 

That sounds great then, seems like it'll cover my needs just about right.

The Chromecast with Google TV comes with its own remote, the regular 4k Chromecast does not. You shouldn't need to connect your phone to it for anything, except maybe the rare app that doesn't work on Google TV but has Chromecast support. 

Glad you got it sorted.
 
Unfortunately, with ethernet cables, you can't always see the obvious fault especially if they've been there for a long time. And it might be a dynamic problem only revealed during mechanical stress.
 
Just goes to emphasize what you did exactly: if you're going the DIY route, take your time and do everything carefully.

Got a couple of days off and really took a few hours to get this sorted.
 
It seems the problem was indeed the cable.
 
After testing with a new cable it had normal 1gbps speed between the routers and was happy with it. The internet situation on the second router was still somewhat weird. At this point I turned to the configuration settings and ended up with the second one configured with ip 192.168.1.240, thus, inside of the DHCP range of the main router, but with gateway set to 1.1 (main router). As an added bonus, I did add the second router to the DHCP reserved mac address list on the main one, obviously, using the same IP of 240, just to make sure.
 
I tried various other cables and configurations with pcs/laptops around the house, all seems fine. Therefore, went to the less pleasant stuff.
 
This is where things become fun. I took out the old cable, as carefully as possible, put in the new one, even more carefully, crimped it again, set the pieces back in contact and turned everything on.
 
It works. The second router has proper internet, relays it on to the wired TV, as well as to the wireless clients on both 5Ghz and 2.4Ghz. Plex on the tv managed to connect every time I tried it, all other streaming apps seem to work fine as well. Pokemon go, on the wifi of the second router now also works without glitches.
 
The removed cable seems fine, had no apparent cuts or such. It wasn't stressed in anyway that is apparent and it was of decent quality cat5e. Broke my heart tho', four or so years of operation seems less than it should be. Should also mention that my cable tester showed contact on all eight cables as if everything was normal just before i cut it up to take through the wall.