I’m glad that it has fixed your problem. Enjoy :)

Use virt-manager (with KVM). Learn how to install guest tools, then enjoy the performance!

Activate it as shown in the comments!

Have you checked the flags in wpa_supplicant? Some routers have non-default encryption schemes.

From my notes, use these USE flags as a test: net-wireless/wpa_supplicant wps wep ap fasteap eap-sim tkip uncommon-eap-types

I’m pretty sure this is your problem :)

Switch to Debian and you’ll be fine :)

For links, I use Pocket (you can use Wallabag, but I find the interface not efficient at all). For files, you can sync a folder with syncthing (but you only switch it on when you want a quick sync, otherwise keep it off for battery). If you just want to put some file on your phone, install FTP server (free) from F-droid and switch it on when you need it (there’s even an optional switch on quick actions). Use Filezilla or any file browser (if on Linux) to exchange your files. Remember to switch the server off once finished, because FTP is not a secure protocol.