Glad you did, thanks!
Well, second law of thermodynamics says that the probability is exponentially large for the number of micro-states a given system can take to grow with time than it is to remain constant- or decrease.
Suppose we start with a bunch of air molecules in the center of a box, and observe what they do after some time. It is exceedingly unlikely that with time, they will stay occupying the same region, or get into a tighter bunch- in a smaller region. This simply will not happen because the number of ways in which the molecules may arrange themselves randomly throughout the box are way, way more than the number of ways in which an "exotic" configuration, like the one I described, can be attained.
Coming back to your point, yes systems do get increasingly complex due to entropy, but they also become much more well behaved than before - behaviour of a bunch of air molecules at the centre or corner of a box is extremely unpredictable (unstable), they may fluctuate in any random way , due to the high degree of freedom. They fluctuate to attain "stabler" configurations, configurations which prevent such massive fluctuations.