Try to add resolution on the target line of your et shortcut (send to desktop a new one). Here is a sample of mine:
"C:\Program Files (x86)\ETLegacy\etl.exe" +connect "b2.clan-fa.com:27960" +set r_mode "-1" +set r_customheight "1080" +set r_customwidth "1920" +set r_fullscreen "1"
Welcome back man! From time to time, I have been thinking of you and how we so would need you to join back
These days b2 is one of the most popular servers on ET and has quite many admins too, new and old. So make sure to visit (set as home server 😄 )!