Not intending to insult your intelligence regarding this particular weapon, but I'm going to throw some "FS2000 history" at you that will hopefully change this situation for the better.
When the original FS2000's came out a few years back, they were using original parts from the military F2000 carbines. This included firing pins. What happened was a few guys decided to (against the advice of the manual, and the text on the side of the weapon itself) use soft-primered American made .223 hunting ammo, and the gun slam fired.
There were a couple instances of these slam fires due to soft hunting ammo primers. FN recalled all FS2000's that had been produced (5 or 600ish), retrofitted them with a new firing pin setup that they began to include in all new FS2000's from then onward.
Here is what FN did:
1) Made the firing pin heavier, this slows its energy down, less chance of slam firing.
2) Installed a captive spring around the butt end of the firing pin that cushioned it and also slowed down the energy with which it struck primers.
Here is the PROBLEM with that they did:
EITHER of those two measures would have been adequate to fix the problem while still ensuring reliable function. However, BOTH fixes implemented together actually created a whole new problem.
Light primer strikes on some harder military primers, exactly what you are dealing with right now.
Ok....here is the fix, you have two choices:
1) Remove the captive firing pin spring. It takes thirty seconds, it's not illegal, it wont void your warranty, and most importantly, it WILL NOT cause slam fires. But what it will do is fix your light strike problem once and for all. I did this after experiencing a light strike ratio of about 1 in 30 rounds. That was 4500 rounds ago and I have not since had a SINGLE light strike. Not a one.
2) You can send your gun (or just your hammer pack) in to FN, wait on them to install a heavier spring that will cause the hammer to hit harder, which will also alleviate the light strike issue. Its free, you are out nothing but your time, but I simply dont see the point when option 1 is so much easier. One or two guys have experienced the OCCASIONAL light strike even after the FN hammer spring upgrade.
****Basically, option 1 (or removal of the buffer spring) is a surefire way to rid yourself of those damn light strikes forever. You might get some FN apologists who tell you otherwise, but its a perfectly SAFE, EFFECTIVE, and FAST way to fix the problem for good. Again, I have done it, hundreds of other FS2000 owners have done it, and none have experienced issues.
I am glad you posted your honest unabashed opinion of the FS2000, but its important to me that all FS2000 owners understand just how small of a speedbump this situation is in the overall "experience". Glad to have you here, and I hope you will update us after you pick one of the above options and solve this problem for good.
***ETA: just realized that I talked all about the firing pin spring but didnt describe where it actually was. Take out your bolt assembly, and near the ass end, youll see the back of the firing pin protruding from the bolt. It will have a spring around it that cushions it and allows you to poke the pin forward and watch it pop back into place. Grab a set of needlenose pliers and pop this pin right off. If it makes a difference, you can do so without damaging the pin at all, and can even put it back on if you are so inclined.
And as for the trigger, yeah it sucks. As a bullpup, there isnt a ton that can be done about this. But, I do have some good news for you. One, it gets better with use, and two, practice will make a hell of a lot of difference. I can hit steel at 300m with iron sights while sitting on my ass, despite the crapster of a trigger.
Hope this helps Max.