[RandomUser]

I hate these situations as well.

Seat 6 is just going all-in, most likely with a lone pair and can be ignored.

If you were going to fold you should have folded to the double reraise on 3rd street. This isn't that bad an option. Let the As knock out the 7s and go on to the next hand.

Calling 4 bets on 3rd and folding to a single bet on 4th is very bad. Once you call 4 bets on 3rd, you have to take at least one more card.

On 4th street, the pot has 765 in it and you only have to call 50. That's 15.3:1 and you are 20:1 to spike a King and 5.7:1 to improve with either a K, J or 6. With those odds, it is an easy call.

Depending on what you hit on 5th street, you can decide whether or not you want to continue the hand.

Personally, I would have folded on 3rd instead of calling the last 2 bets cold, especially in a tourney situation.