Don't you think you're relying on having your characters roll natural 20s and one hundreds a bit too much?
Critical Fail Spot Check
Some people just get that lucky. Just like how some people are literally that UNlucky.
A roll of 100 is actually a bane for me. And so it comes up a LOT more often than I'd like. 1% is actually a very high chance in an RPG, statistics be damned.
they seemingly were rolling a lot
They don't tell us all the numbers rolled or how many rolls have been made in this comic. take a look at the fact that Luke hit that rock wall 5 times on low rolls, meaning that he likely rolled 20 times by that point alone, if not more.