Obviously his plan was to sabotage your shuffle luck.
I was going to say something like "Why did you buy HG on T5 with $7 rather than a second Witch?" Because, I mean, that seems like a pretty reasonable question; I think you want a second Witch here early.
But then I look through some more of the log and see that T7 HG and Witch collided (with no WM), then T9 HG and Witch collided again (with no WM), so buying a second Witch there wouldn't have mattered. Meanwhile, he hit his Witch on T5, not T7. And while you were busy getting killed by collisions, he was Remodeling Estates into WM. GG at that point.