H1: My flop bet would be 600 vs 3 players. His raise would likely be 1800 the way he played it. But maybe 2000 or 2100. So it would have saved you some money in the long run. The flop favors the other players ranges. As for the river I do think its a fold as played. The 5100 bet on the turn is not really a standard raise amount its a solid value bet amount. Most bluffs will be 3100 there. Funny thing is I would almost jam on the flop. If he had made it a normal 4800 flop c/r I would have probably jammed and bought in again just about anywhere but the Aria where you would probably be on a 2 hour wait list...
H2: Flop call is good because other player could hit gutter. Turn raise was excellent in that she called. I personally would have called again to see if other guy calls or raises with a 9. River bet is probably excellent as well. Maybe sometimes she calls. Against me she would check I would bet 75% pot and win less than you did.
H3: I don't think there is a good way to play this hand. Your pre-flop sizing is perfect. Yet you got two callers. Your flop bet sizing is perfect as well. The Rec's raise however was small. It should have been like 14k. The guy either is bad and has a set or he is on a draw. Or he has like A7/88/99 and thinks your small flop bet means you don't have an overpair. I would be tempted to jam here specifically because you have the T
(you didn't say what other stacks were) and because aggro guy just called you. If I don't jam I am probably calling though given stack size.
Here's the thing about tournament poker. When you win a couple of tournaments or cash big, the luck thing can go south for awhile. Its happened to me twice. The first time I won a $600 tourney at FW (basically won all my flips) after cashing in a few others and didn't cash again (for much) for like 14 months. Then recently in 2021 I placed 3rd in a huge Venetian tourney (lot of luck involved) and won a FW tourney (some luck involved) and went a little over a year with like three small cashes in 80 entries (so close to 1 for 26 three times in a row). In the last month and a half though I've cashed 7 times in my last 16 entries here in Prague where only 8% cash. And one of those was winning a big tournament (not particularly lucky on the flips) well a big tournament for Prague (they are giving me a trophy with my name etched on it). I'm hoping this will last through my Vegas visit which is coming up soon. But I've gone like 1 for 20 and 0 for 13 in Vegas as well...