I've been riding for 25+ years. Stuff can eventually fail (break) but it sounds like you might be riding some wimpy stuff and/or have questionable maintainance practices. Maybe not, you could be the baddest cat alive riding Mt.DOOM
My old riding partner was a parts breaker (5-6 hours a day on a bike ex pro) but it was usually due to poor maintainance, wimpy ass lightweight parts and general indifference due to his wife's substantial trust fund.