In all seriousness and honesty…
Yes, at 30, you’re going to have some serious age bias. When I was your age, I was going through something similar with applying at Big 4 auditing firms. They wouldn’t even look at my resume.
Right wrong or indifferent, these “ivory tower” folks have an ideal candidate in mind. (I’m speaking about Big 4 Audit, but I’m sure PIMCO and Goldman Sachs are similar.) BBA in accounting with the 5th-year option to be CPA ready, 23 years old, not married, no kids (because married with kids means that you won’t want to work the 75 hour work weeks), finished a semester-long internship, etc.
If you’re 30, then you probably have less energy and desire to work 75 hour work weeks. Plus, since you’re doing this in your 30’s (instead of at 21), then they probably feel like you’re not “one of the elite”, or have some lack of motivation, discipline or desire to be what they want you to be. (It’s a lot easier to brainwash a 21 year old than a 30 year old.)
I hate to be the bearer of bad news, but I don’t think you’re going to get what you want. That said, I went a different path than Big 4 Audit, and I’m extremely happy now. I make pretty good coin, have good work-life balance, love what I do, and I get to set my own schedule. (Plus, I don’t have to deal with any 23-year old turds telling me I’m an old man or that I have to “do my time”. Trust me–you don’t want to deal with those children.)