Welcome. Feel free to talk as much as you want. We are all here to help and sometimes one just needs to vent. We are all family here so we understand your troubles. I too have trouble with getting my pieces to match up. One thing that has really helped me as been a quilters 1/4 foot. It has a guide on it and it makes it really easy to make sure you are getting your seam allowance right. If the seam allowance is off even just a hair it will all add up when you piece it. Just keep trying and it will get easier. Feel free to post pics. We all love to see the talent of others.
Welcome from Missouri
Barb