You have other options thankfully. If you’re in a large city, you can often find small independent retailers which sell tickets. When I lived in Toronto I used to go to a record shop to buy mine.
You can also go to the venue directly. Oftentimes if it’s a smaller venue they’ll have tickets available as well. Stadiums usually don’t go this route, but it’s worth a shot.
Lastly there are other online retailers for tickets like stubhub.com
Ticketmaster is a goddamn scam. The entire industry knows it, but it makes money for the labels so they tolerate it. There’s a reason Taylor Swift and The Cure have been making a big stink about them lately. I personally won’t go to a concert if Ticketmaster is the only retailer, but I’m fortunate that most bands I see play in smaller venues.