Klipsch Forte ii too bright, or is it my room ?

Klipsch for starters are severely bright.

Conventional "wisdom", but maybe not so wise.

You can make Klipsch loudspeakers bright if you are careless. You can also make them rich and tonally accurate if you pay attention to the details. Many people don't, hence the reputation.

Schiit equaliser.

Old.  Tired receiver, nice but tired.  

Speakers can have crossover replaced 

Most importantly, fix the room.

I read many folks recommending tube amps w/ the OPs Fortes. I've used a modern tube amp w/ my Forte I speakers and it's not a magic bullet for Klipsch Heritage loudspeakers. It can still sound bright because of the extra air and spaciousness from my tube amp which multiplies an already lively speaker. I find room placement and a less lively large room than I have plays a very important part. The tube amp is beautiful w/ Klipsch but won't necessarily tame the highs if there is other factors. I also find the my Linn K20 low capacitance speaker cable is a perfect match w/ my Klipsch.