Hi guys I need help

Im not an expert but i have a feeling my converge connection is not stable

because i Connected it on my xiaomi router ax3600 -

All I did is plug and play, now im having issues on browsing, the sitespeed is good

But loading up browsers takes time and sometimes my apps, spotify, netflix, skype, telegram and whatssapp doesnt load up

please teach me how to set this up properly. thanks!