Killed by horrible calls

I played my first tourney in like 2.5 months, the $300+20 Wednesday with a prize pool of almost $200K. I was cruising but then I was killed by these 2 hands:

Poker Stars, $300 + $20 NL Hold'em Tournament, 100/200 Blinds, 9 Players

UTG+1: 2,345
UTG+2: 3,520
Hero (MP1): 7,355
MP2: 4,608
CO: 2,630
BTN: 8,260
SB: 4,065
BB: 11,277
UTG: 7,786

Pre-Flop: (300) K A dealt to Hero (MP1)

2 folds, UTG+2 raises to 600, Hero raises to 2,200, MP2 calls 2,200, 5 folds

Flop: (5,300) 4 4 6 (2 Players)

Hero bets 2,600, MP2 calls 2,408 and is All-In

Turn: (10,116) Q (2 Players - 1 is All-In)

River: (10,116) Q (2 Players - 1 is All-In)

Results: 10,116 Pot

Hero showed K A (two pair, Queens and Fours) and LOST (-4,608 NET)

MP2 showed 8 8 (two pair, Queens and Eights) and WON 10,116 (+5,508 NET)

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Mmmmmm, calling 50% of your stack preflop after a raise AND a reraise with 88?
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The second one:

Poker Stars, $300 + $20 NL Hold'em Tournament, 100/200 Blinds, 9 Players

BTN: 2,045
SB: 3,820
Hero (BB): 2,747
UTG: 10,116
UTG+1: 2,630
UTG+2: 7,560
MP1: 3,375
MP2: 11,867
CO: 7,686

Pre-Flop: (300) A 7 dealt to Hero (BB)

UTG calls 200, UTG+1 calls 200, 6 folds, Hero raises to 2,747 and is All-In, UTG folds, UTG+1 calls 2,430 and is All-In

Flop: (5,560) 5 Q 4 (2 Players - 1 is All-In)

Turn: (5,560) T (2 Players - 1 is All-In)

River: (5,560) 6 (2 Players - 1 is All-In)

Results: 5,560 Pot

Hero showed A 7 (high card Ace) and LOST (-2,630 NET)

UTG+1 showed A 8 (high card Ace) and WON 5,560 (+2,930 NET)

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Calling in EP with a semi-shortstack with A8d, and then calling the 14x all in, just in case your hand is good ??
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Well, a warm welcome to donkaments, to be honest, I don't remember the field for the $300 being this bad, but that's a good thing, right?