sector9's are NOT terrible boards, especially for the price. Many people use cut-down bombhills and the special race deck (cant be bought) in serious races like maryhill, and do very well. also, the nut falling off your axel is not sector9's fault. they do not make the trucks, or bearings. gullwing makes the trucks (a very good truck company), and the bearings are generic abec 5's which are not bad at all. my guess is that you didnt take care of your bearings very well, and didnt make sure your axel nuts were tight. the only way friction builds up is if your bearings seize up which is caused by either water getting in them and rusting, or using something like WD-40 to "lubricate" them, which actually eats away at the bearing's grease, making the balls rub metal on metal. even if your bearings siezed up, before the nut fell off from friction, your whole wheel would melt from the bearing seat out. i bet the nyloc insert in the axel nut was either worn off, or it wasnt tight enough, making the wheel fall off. also, EVERY board cracks. most boards are made from the same wood and in the same way, so by saying that sector9 sucks because their boards crack, you have to say that every company sucks because their boards crack. even the super-duper loaded dervish cracks alot, along with my $400 rayne dee-light hellcat, but no one will say that rayne and loaded are shit.
im sorry for the harshish rant, but it needs to be said that sector9 boards are not shit. sure there are better and much much more expensive boards out there, but when you are paying $70 for a deck, you shouldnt be expecting top of the line quality anyway.