The tests Zellner did on the sink were not with unmodified blood. That blood came right out of a test tube, where it had been for a period of time, and had not clotted. There is a difference between blood clotting and drying. They are not the same thing. Blood clots because it is stopping a wound from bleeding. It actually has mechanisms in it that make it coagulate to stop bleeding. That was not legit, normal blood. Period. Go back and watch it right now.
So your theory is that Steven bled, the Tadych's knew IMMEDIATELY that Steven was bleeding from a minor wound into his sink, and then got lucky in that Steven IMMEDIATELY left his house, and then they went over and found his blood, had a pipette, sucked his blood up, then went full speed to the car and planted it on several different parts, and then rubbed his sweat (or whatever) on the hoodlatch? All within a matter of minutes before his blood coagulated? (Also how amazing Steven get a linear wound on his finger (new or "opened up" - is there proof the wound was there previously? I'm not sure) at the same time he is suspected of slicing a woman.)
I'm not saying you're wrong I just want to ask what is more plausible: a stupid man named Steven Avery got caught committing a murder, or there was an extremely elaborate frame job and the Tadych's were crime lab geniuses that got incredibly/impossibly lucky with finding blood and having the lab equipment with them to suck up blood and transport it to the crime vehicle that was many acres away. Also, why would the Tadych's do this to Steven when they would have benefitted too from Steven getting 36,000,000. Steven was all of their meal tickets.
I'm honestly shocked by the people who take this drama-documentary at face value. There are many things that are just 100% wrong in it.