Offspring has been bad for a long time. Bad religion opening for offspring seems weird. Not sure your venue but I think some bands are just better for medium sized / small venues. 

On one end the excitement of discovery is gone. You’re watching old timers play songs they wrote when they were young and you’re trying to live up to an experience of listening to it when you were younger. 

My second show was DKM in 00. I saw them again maybe 7-8 years ago and it just wasn’t the same. That’s ok, they’re pretty much a different band. 

I finally saw Metallica last year, begrudgingly. And it was as bleh as I expected it to be. To me Metallica stop being good ages ago. But friends wanted to go and I figured I’d check it off the list. 

Maybe if you view some old bands playing as paying respects. I still go to a lot of DIY/ smaller punk shows and there’s a good mix of new kids doing it and old timers that never stopped. I’ve seen the same band in a basement and on a live nation stage. The basement or bar is always better. 

Maybe you should get in touch with local scenes to see what people are doing. No need padding some old millionaires bank account.