That's part of the challenge, it's called Insane for a reason.
All you're doing is cheating, and normally I wouldn't care in the slightest as it's your game, but just don't try to pretend it's not.
Don't be stupid, it's not cheating at all.
Getting stuck between monsters? Sometimes there are stuff on the ground which are obstacles, but not obvious at all. You get stuck in a corner due to a technical reason.
There is also the bug that makes your combat freeze up. It seems to be triggered by the R button. Sometimes it freezes up completely and you have to reload (basically you can't fight but opponents don't damage you either). Otherwise, it freezes up, you can still move the camera but cannot block or do left mouse action; until you take damage... which snaps you out of it. Of course, that could easily be fatal. This is a well documented bug.
I also clearly remember one QTE that you can die from, it's an orange QTE on an equally orange background, in the middle of a fairly interesting cutscene/conversation. = VERY hard to notice unless you are expecting a QTE to appear.
If you die due to technical issues with the game, and reload, I wouldn't call that cheating and I would guess a lot of people wouldn't.
And lastly, this one is just my opinion, but I don't think cut scene deaths are that fair because you don''t know what gerald will say before hand. i.e. the full line is not displayed to you.