Maybe some saw basic's with regards to cutting square, never had any issues with Bosch saws but on the occasions that I have got a bad cut it was easily explained. On one or two occasions I had not returned the saw fully into the 0° indent and on another I had not noticed some debris that held the wood slightly off the fence, a quick brush solved it. Then how good is the square you are using to check for squareness, there are some really good ones out there but also some really iffy ones so before blaming the machine ensure you are using precise measuring tools that you know are spot on.