I have springs in all my M3/R4 products, no problems here. Maybe take better care of your equipment
My M3DS real is brand new and it has already jammed on two separate occasions in only a few days. It has nothing to do with care. In fact, the second time, a small black fleck of plastic fell out that I believed was causing it. However, I see online now that many, many, many people have had trouble with it. Also, on one occasion, the microSD card launched out of it and I nearly lost it! If you are pushing to eject, make sure your finger doesn't slip or you will send that card flying!
I wonder why it FORCEFULLY ejects the mSD card and yet the M3 itself can
barely fit the DS (has to be tugged out)? I guess they made it nearly as thin as possible, because the bottom side of the PCB with the Actel chip fits through a casing hole and is only covered up by the M3DS real label. The raised area around the label proves that it's not "as thin as possible" though. Use thinner label paper M3 team!