I don't know how familiar you are with St. Joseph's but according to their website, their high-school enrollment isn't even 400, so it isn't like they are a massive school with thousands of athletes to choose from who then compete against smaller schools and lesser opponents just because they can.
I tend to agree with many folks on this message board that the way soccer is done in this state could benefit from a structural overhaul. No state championship game should be that one-sided - in theory it should be the best game of the year.
That being said, it isn't right to knock the St. Joseph's team or what they accomplished either. The reality is that they didn't magically become good overnight - they built a program over many years that has now found success. I remember 10+ years ago when that school just opened and their soccer team was co-ed, and look where they are at now.