flow hairs turned brown

The buds are really fluffy and have very little density one one plant but most of the white hairs have turned brown/red. Does that mean that I should harvest??

no look at the trichs

Honestly, if 85%+ of your hairs are atleast dark orange its time to harvest... allowing hairs to turn mostly brown is a late harvest. Checking trichs gets a high just right, but true harvest time is when 85%+ hairs are dark orange (not brown).

When it's done, it looks "done"; they look like hell.

look at the trykes. You have to go by the trykes. thats where all the good stuff is. everything else is simply support for what's happening there so it makes sense to make your decision based on those trykes.

I would take a look at the trichs to see what is really going on, but in all honesty, it sounds like your plant is ready for harvest.