The biggest deadlift problem? Not having a proper setup in terms of where the bar path begins and ends.
In short, don't set up where the bar is too far away from your shins. This creates a large lever arm for the lower back and huge sheering forces.
The bar should start right beneath the shoulder blades, close to the shins. This will set you up for a proper pull – the bar will go up and down in a straight line.
Foam rollers, lacrosse balls, back walking, kettlebells. Can these work as tools to fix tightness and pain? Not when you use them like this. Here's what works better.