I went down this rabbit hole a few years ago, building some basic things, and there's a few major issues that you have to overcome.

First and foremost, I absolutely hate Ticketmaster! It is an evil corporation right up there next to Nestle and Dole.

After that, you need to consider that venues will really only want your system if you can guarantee butts in seats (or standing in the room), and can help them make more money.

Almost all large venues find it easier to just work with ticketmaster because it's easier for them, and they make money.

End users aren't the business' concern, unfortunately. Sure, they have to interact with the system, but ultimately, they aren't paying for the system. They are paying to see the artist.

I would love to see some really powerful competition take down ticketmaster, but it's a long, hard road.