Poker in the micro and low buy-in is lottery, players out there doesn't know ranges, 3bet...etc think about it, on a flop 932 and you are the preflop aggressor with AA, if you move all-in you'll get called by someone holding the 9Jo and hit his J on the river.
Pushing with KK after a R/RR/RRR and V is holding 88 and hit his 8 on the Turn.
4betting in the BB with AA and UTG moves ALL-in with KJs and hit 2pairs on the flop, and bust you out.
Plenty and a lots of example like that on the micro and low buy-in MTTs. However if you play some 33$ and higher buy-in you'll notice the difference in play, your bluffs will work often especially if Villain is holding one pair, 3bets and 4bets are respected...etc
I think that every player should choose the right limits that he's confortable with, that's the starting point where you'll be either a winning player or a losing one.