Internet connection loses speed

I have been running Zorin 15 for a while now and for a couple of weeks ago, my internet connection began to lose speed. It's whenever I am connected to my router at home or in other places. My computer can easily connect to the network but after a while, it won't receive any data.
I have tried different options such as disable IPv4 but it didn't help.
I am in doubt that the frequencies have an impact on the internet?

I have done the

Code:

iwconfig

in Terminal

Code:

wlp2s0    IEEE 802.11  ESSID:"midte73zobel54sulky" 
          Mode:Managed  Frequency:5.32 GHz  Access Point: 84:17:EF:28:76:60   
          Bit Rate=6 Mb/s   Tx-Power=20 dBm   
          Retry short limit:7   RTS thr:off   Fragment thr:off
          Power Management:on
          Link Quality=63/70  Signal level=-47 dBm 
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:32   Missed beacon:0

enp1s0    no wireless extensions.

lo        no wireless extensions.


If you need more information about my computer, let me know.

In advance, thank you

Open a terminal (Ctrl+ Alt+ T) and enter:

Code:

lspci

Can you post back the results of wlan0.

Also disabling IPv4 won't help - if anything you should disable (ignore) IPv6.