fooqpmaxieI had a similar situation as yours, and my solution was just buying another g400s, honestly. I had mine for almost 3 years.I went and checked out mice and I tried the rival 100, ec1-a, and g303 and I still didn't feel the same whatsoever. The trial and error just got me more frustrated.
wish i could find another one g400s in my city but seems like it's impossible :/
is there no way you can order one online?
if not, that was just my situation, you can probably do some research and find one with a similar sensor/weight/grip that you could get used to