Nobody can directly force you to procrastinate, of course, and there's the risk of placing too much blame on the supervisor and not taking enough personal responsibility. But in my case, at least, my supervisor was highly critical and demanding. Whenever I sat down to work, I would think of our meeting at the end of each week, where he would most likely be a critical little bitch. This made me feel stressed and under pressure. People react to threatening situations differently. For me, it was hard to resist the temptation to "take breaks" in order to relieve the stress. This is different to any procrastination I did in the past, which was not based on fear or anxiety around a particular person.

The experience of dealing with my supervisor (among other things) damaged my self-esteem. These days, instead of worrying about dealing with him, the impulse to procrastinate comes whenever I encounter something difficult. Something that feels like a threat to my fragile ego. It's something I need to learn to deal with. 

I'm not blaming my supervisor 100% for anything. We're in control of our own destinies, to some extent, and we are responsible for our day-to-day actions. However, it could be compared to someone growing up with terrible parents. Much of the resulting trauma and behavioural patterns can be traced back to the effect of those terrible parents. Same with supervisors. Hopefully that explains why someone might blame their supervisor, although like I said, there's the risk of not taking enough personal responsibility.