If it's a Varial and not a Varial X then it's 2010 or 2011 and a much flatter kite. I had them and the 9m and smaller did the same especially with my 95 kg (hence using it in stronger wind than lighter rider)
Basically it's not you, it's the kite if like I said it's the older Varial.
It´s a Varial (not Varial X) from 2011.
I trimmed the lines the other day. The center lines were (not suprisingly) longer than the steering lines. However with the default settings with this Varial kite it almost feels like riding a depowered kite, so I´ve made extra nots to tighten the steering lines about 2 inches.
Will try to go back to the default settings and see if the kite still collapses when I loop it.
I´m also quite heavy btw, 87 kg without wetsuit.