dude thanks for a look at the pedals and your thoughts. please get your monitor fixed now before you need to fix it for real. the pcb is just asking for solder breaks, loose components etc.. etc...
Hydraulic brake kits are imitating the hydraulic dampening effect of hydraulic fluid moving through the cars braking system. It's uncommon the brake pedal feels dampened on road cars because break boosters and abs systems isolate the driver from the direct forces (not to mention more modern cars have brake by wire so there's no mechanical linkage to the brakes
The part where you mention needing a shorter spring on the brake pedal, im assuming your doing that to simulate real life brake pedals. How its soft and doesn't bite yet, as its just filling the gap from pad to rotor correct? I've found that when i go into the calibration settings, i can apply a small amount of pressure to the pedal, and use that number as my min number, so in game im getting a way closer reaction compared to real life scenarios. But im also running an entirely different elastomer setup. From top to bottom, super stiff, medium, soft, then a medium spring. I can always try to get the exact numbers of the elastomers and spring if you happen to need them