Even where it comes to cases like St. Therese, were it not for her elaboration rearding the Little Way that the Church wanted the faithful to emulate, she probably would also have gone uncanonized, as one of many tens of thousands of devout religious who loved God, did their duty, accepted their sufferings, etc. She worked no miracles and did nothing "out of the ordinary" otherwise, was not incorrupt, etc. Were it not for the Little Way, there wouldn't be anything that the Church would have to hold out there for emulation that any other devout nun had been putting into practice.
So when the Church canonizes people, it's really only partly about the individual, since that individual is a saint (or not) whether the Church declares it or not ... but it's mostly about the "message" being sent to the faithful, and examples to be followed.
What's the message about Acutis? You can be a regular ordinary run-of-the-mill teenager but be interested in the faith some, and that's worthy of canonziation? I would think that it's setting the bar pretty low, and if you set the bar so low, you know that most people will fall short of the bar, and that is precisely the reason for setting the bar higher.