Hardcore Henry isn't the first film to experiment with the idea of the audience being put directly in the shoes of a character within the movie. It's not even really a rare technique - there has been a lot of found-footage films over the years that for the most part replicate the effect that Hardcore Henry is going for, which means that the question of "Can a film work when told from a first-person perspective?" was answered long before Hardcore Henry ever hit theatres. Yes, it can, and we've seen that it can multiple times before.
Which makes Hardcore Henry's failure as a film all the more difficult to swallow. This isn't an experiment in film-making that just so happens to have failed, it's an indulgent attempt to one-up the music video on which director Ilya Naishuller made a name for himself. In fact, it seems generous to really refer to Hardcore Henry as a film - lacking all the things that make a film a film (such as a story, characters, structure, themes), Hardcore Henry is instead nothing more than a 90-minute long music video, and I do mean that in the most derogatory way possible.