Although I'm not going to say it's definitely the case, I have endured a ludicrously trigger-happy mouse myself and it was so bad that I ended up having to get a new one, which is much more agreeable. The old mouse is now my backup and travel mouse where it still manages to annoy me.
I've had similar keyboards too, where the low weighting and trigger height can make them frustrating enough for me to want to gnaw my own fingers off. Apparently some of our secretaries loved them, but, whilst I'm not the most leaden-handed two-fingered programmer out there, I found them exceedingly frustrating to use. With both keyboards and mice I'm much happier with quite a heavy actuation force.