I Feel your pain.
I Seldom play Huge field MTTS
This week alone I've had 3 top 50 finishes - No final table, pokerstars
from just 5 mtt's the fields average around 3,000 to 5,000 in the micros.
for me (and most players) The worst thing you can do Is play another If you miss out marginally on Final table after 4-6 hours I usually clock off for the night.
Take a positive from your deep run. move along and be optimistic.
any average tournament player can final table on their day given the run of cards.thats a FACT!
Even the sunday million.
Stay positive and just remember chances are you will get that big win one day if the volume is their