XPS 15 9570 - new yet so many problems

I bought a new Dell XPS 15 two weeks ago , but I'm really not satisfied as it comes with a lot of problems:

1. The keyboard skips keystrokes (like 1 on 5)... I just can't type text! How can Dell send me such a product? Before sending they could have open the laptop, test the keyboard, and the problem is obvious. I had to browse through forums to get to know that Intel "Panel Self-Refresh" option should be disabled, and indeed that fixed it (and seems like it sometimes re-enables by itself...). How come Dell does not send me an email, or call me, or send me a notice with the computer, to let me know the system needs a fix... it's ridiculous.
   
   
2. I didn't buy this laptop for gaming, but just out of curiosity I tried running Quake Champions. Whenever a new match starts, it lags for the first 30 seconds, unplayable, like it still needs to load the map or something. Is this normal? I thought the GeForce GTX 1050 Ti should be powerful enough to run recent games.
   
   
3. I ran Support Assist several times before in order to update drivers and the Bios. But now, SupportAssist program doesn't launch anymore. I tried to reboot the system but when I click on SupportAssist, nothing happens... no windows appear.
   
   
4. When I plug in a USB-C cable in the USB-C/Thunderbolt port, the keyboard again skips keys, and seems very laggy. However, that only happens sometimes when no device is connected at the other end of the cable.
   
   
5. I bought an Anker USB-Ethernet adapter and when plugged in, after a few minutes, it disconnects. I have to unplug and replug it, and then it seems to work for a long time. (Might be Anker's problem but at this point, I highly doubt it...).
   
   
6. When plugging an Asus ZenScreen through USB-C, Windows recognizes 3 screens instead of 2.

This computer doesn't work as expected out-of-the-box and requires tweaking. The first problem mentioned is just unacceptable. Just type "dell xps 15 9570 skipping keystrokes" in Google and a lot of users are encountering this issue for months. Dell should know about this problem as so many users are reporting it for months, yet Dell still send me a broken laptop for 1.800 €.

Overall I'm very disappointed to encounter so many problems for such an expensive computer, which is supposed to be premium.