I would also be interested to know what the other saws were that you wore out in a year...and what do you mean by 'wore out'?
Even a Poulan should go more than a year assuming you keep the chain sharp and maintain it. I mean, I have one I got for free that was pretty well used, cleaned the carb, and I've probably got 40-50 tanks through it which is at least 20 hours on it and it's not 'wore out'.
People that I've seen go through saws like going through underwear are running them with dull chains and reefing on them constantly. They get them real hot and cause all sorts of problems. Plus, most of them don't keep the air filter clean or do other general maintenance items either...so...it's a recipe for disaster.
Any chainsaw run with a dull chain for extended periods is not going to last long. If you're not touching up your chain every 2-3 tanks of fuel, you're running a dull chain.