The current event gives you Red transmitter but they changed the Rates on GF so you get only 3 star cards and sometimes like 1 out of 100 a useless GC mob card
And how come you know that ? GF never made the rates public. You can only check jp/kr rates on wiki. Are you comparing your luck betweeen every version you played? I could do the same and blame jp for having barely two usefull 5* passives. But complaining about rng is kinda dumb.
Imo nothing wrong with the rates, I finally got every akasha I needed on gf, the last remaining one from this event. You are just unlucky ;/