Sorry to hear about ur experience with all the rackets. IMO, u got a complete set of options; HL, EB & HH. What type of doubles player r u & what do u want to improve upon? Train ur wrist, footwork & technique for a few months & see if things change. This is speaking from experience & countless badminton rackets.
I will be uploading a video soon of one of the games for review/criticism by BC members.. I think I am not good in front court (behind in reaction speed and thus weak kill shots) and my control is a bit lacking. (primarily play doubles).. i.e. unforced errors in trying to make quality shots. Not patient enough and vulnerable to counter attacks is what I feel is also a problem.