Perhaps, but ask yourself this.
If Trump wouldn't be an absolute disaster in a general election, then why is the GOP establishment panicking as if his nomination is the end of the world? We have party insiders talking brokered conventions and third party candidate runs.
There was none of this talk around McCain or Romney- and the party establishment was less than thrilled with Romney, looking to replace him with people like Christie up until the last minute.
Overwhelming consensus isn't that Trump isn't just "worse" but an outright disaster for the party that will have serious down ballot consequences.
I do think that he would be a disaster, but he'll be doing most of the damage to the down ticket races. Anyone in a tight race will be absolutely fucked on every single level. They aren't afraid of a general election blow out so much as they are the damage he'd do the their control of Congress. Tying Trump to most of those Congressmen running will be easy as pie/