Respect, 120 knots is 138 mph. The “dive” could be a Stall. But I see it as you do, except any wingtip contact with the house across the street puts the heading rather too far right? The damage to the roof looks very much like the gear went through the structure. Construction detail. The roof is framed not with rafters, but “purlins” ninety degrees relative to standard rafters. It is possible the framework is “applied purlins” to support the outlook. Purlins in that design would be a rarity, imo.
This gives great longitudinal strength to the roof against damage in the direction of the aircraft. Do you see where the skidmarks show a change in direction to the right, suggesting the contact with the auto imparted a rotation in that direction?
Or, at least an impediment to continued forward scrub?