I think Malvo is just motivated by chaos, and not money.
This, completely. It was clear from the first episode when he killed Lester’s bully. He had no financial motive for doing this, he just did it because it amused him.
I quite enjoyed the series – it suffered a bit through being compared to
a) the original movie which is an all time classic (I’ve seen it loads of times and no doubt will watch it many more)
b) the incredibly high standard of current US drama. Compared to Breaking Bad, True Detective, Mad Men, GoTs etc it felt a bit 2nd division.
Still it was nice to have something decent to watch on a sunday night on free TV