Mates, I tried what @CariKahn told me but it still not working. Justin, could you please explain me how can I choose between WiFi channels?
[deleted], sorry for saying that, but I'm kind of relieved that I'm not facing this issue alone 
I also realized that it was not a hardware problem when I saw that my Windows 10 still working (dual boot). But I don't want to need to use it more than I was doing 
He means wifi channels at your router config, how to change your router channel for the best Wi-Fi
[deleted] ThinkPads usually have issues with the iwlagn/iwlwifi kernel modules, use lspci -vv | grep Kernel and find which kernel driver you use iwlagn or iwlwifi
echo "options XXXX 11n_disable=1" | sudo tee /etc/modules-load.d/XXXX.conf
sudo modprobe -rfv XXXX
sudo modprobe XXXXAngelKrauze It seems to be using iwlwifi:
⯠lspci -vv | grep Kernel
Kernel driver in use: skl_uncore
Kernel driver in use: i915
Kernel driver in use: xhci_hcd
Kernel driver in use: intel-lpss
Kernel driver in use: intel-lpss
Kernel driver in use: mei_me
Kernel driver in use: pcieport
Kernel driver in use: pcieport
Kernel driver in use: pcieport
Kernel driver in use: snd_hda_intel
Kernel driver in use: i801_smbus
Kernel driver in use: e1000e
Kernel driver in use: rtsx_pci
Kernel driver in use: iwlwifi <------------------
Kernel driver in use: nvmesudo modprobe -rfv iwlwifi Gives me an error since iwlwifi is still in use, will get back to you after a reboot.
EDIT:
Rebooting did not help :/
AngelKrauze Hey, could you help me to fill the gap between the first and second command you suggested? Do I need to reload something?
I would really appreciate your help 
Justin That's unfortunate, I hope so too.
It would alredy help a lot of someone could help me diagnose the issue so that I could know where to look for solutions :/
Right now I just know that an update must have broken it, because it has been working great for years and a clean install did not fix it (because then the same update broke it again).
Justin Thank you for having a look!
⯠lspci | grep Network
03:00.0 Network controller: Intel Corporation Wireless 8265 / 8275 (rev 78)You're experiencing the same issue as @crom5 is. It's an upstream issue with Linux 5.1+ per https://bugzilla.kernel.org/show_bug.cgi?id=203709 as well as https://bugzilla.kernel.org/show_bug.cgi?id=204141.
See my remarks at https://discuss.getsol.us/d/2015-wifi-unusable-after-yesterday-s-updates/6
I was having that kind of problems when I was linux mint user and also it was kernel related. That's why I always use lts kernels (my hardware is 8+ years old so I don't have problem with lts kernels). Try to install lts kernel and see will it resolve your problem.
JoshStrobl Thank you, I was able to install and switch to 4.9.188-135.lts, I will see how well it works
Update: After changing kernel to linux-lts, I have yet to experience the issue again. Thank you for your help!
Good to hear! I'm going to marked this as solved in that case. Hopefully @crom5 will also take my advice 
