Was it the religion that influenced your parents to be like that? Or would your parents be overbearing regardless of religion?
I know that a certain doctrine called "free agency" was ignored by your parents. As was the whole concept of "charity." When looking at the family proclamation and other church teachings, raising a family can be interpreted in varying techniques and methods. However, that whole forcing, over-extension, and taking away stuff that wasn't theirs to take away, is sort of the opposite of what the church teaches.
I wonder if your parents would find excuses in other christian denominations, Islamic groups, and eastern religions to rationalize their actions? This is more on your parents than on the church. If you were Muslim then chances are they would have taken away all that stuff to force you on a pilgrimage to Mecca.
And to be honest, I've never understood why parents use forms of bribery or punishment to force their kids on missions. Perhaps it's because of societal pressures? Or because parents can be jerks and way overbearing? But anyone that has actually been on a mission can tell you that the good to best missionaries are the ones that want to be there. Those who suck, are those who are merely there because of their family, friends, or want to get married easier.
IMO, people use the church to rationalize their overbearing and offensive words and deeds. While many blame the church for failed relationships which would have failed anyway regardless of religion. It's impossible to know for sure, but if it hadn't been your mission it probably would have been something else which would have driven a wedge between you folks. Heck, other issues were probably already boiling over when all of this went down anyway.