EndeavourOS network manager reinstall

Hello y’all, I’ve got my wifi speed limited.
I tried to boot from LiveCD and speed was as intended

So, I’d like know is it possible to reinstall network manager or find a solution for it, because simple:

sudo pacman -Syu networkmanager
sudo pacman -Syu iwd

or
sudo pacman -Syu wpa-supplicant
Doesn’t do much

inxi -Naz for the hardware details

Network:
Device-1: Intel Ethernet I217-V vendor: Fujitsu driver: e1000e v: kernel
port: 3080 bus-ID: 00:19.0 chip-ID: 8086:153b class-ID: 0200
Device-2: Intel Wireless 7260 driver: iwlwifi v: kernel pcie: gen: 1
speed: 2.5 GT/s lanes: 1 bus-ID: 02:00.0 chip-ID: 8086:08b1 class-ID: 0280

If you have problems connecting to networks in general or your link quality is very poor, try to disable 802.11n, and perhaps also enable software encryption:
create system modules configuration file:
/etc/modprobe.d/iwlwifi.conf
adding this as options for the wifi device module:
options iwlwifi 11n_disable=1 swcrypto=1

and reboot to apply.

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Why every time I write something here it gets fixed itself… anyway, is there any way to do it, I’m still curious

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Your post or your actual issue is fixed?
Network slowiness on wifi can be caused by interference loacally too… or some update of the kernel and not rebooted e.t.c.

Actuall issue