There's a more precise list of increases here:
https://allears.net/2024/07/18/price-increases-hit-popular-disneyland-restaurants/
Most of the numbers they cite represent a 3-7% increase.
Everything you describe has been happening for decades. While at DL, you were surrounded by 50,000 other people who were also eating snacks from home, sharing meals and only occasionally buying a new shirt. Disney doesn't even have the restaurant capacity to serve every guest 2-3 meals per day. We've traveled across the country 6-8 times to visit
Disneyland and have never eaten at Napa Rose. Every night, those restaurants only host a tiny fraction of the number of guests visiting the parks or staying at a nearby Disney hotel. Napa Rose doesn't need to be affordable to the masses--it only needs to cater to a few dozen parties per night.
Disney theme park visits are absolutely expensive. And they always have been. Unless you're a local with an Annual Pass, the average family probably does have to save up several years to be able to afford one visit. I'm not sure that has really changed over time. Back in the 70s and 80s, did any of us know families who traveled long distances to visit WDW or DL every year, much less multiple times per year?
Disney has run this cycle many times over the years. Most noteworthy were the travel lull after 9/11/2001 and the 2009 "Great Recession", both of which impacted vacation spending for at least a couple of years. In both cases, Disney played the discount game and generally kept the hotels and parks full. If restaurant demand sags or they need to move some merch, they will temporarily increase the discounts for Passholders or DVC members. When hotel occupancy declines they've done similar discounts, sometimes expanding to
Disney+ subscribers.
Like the economy, tourism is cyclical. Right now, theme park tourism is a bit down. During the last quarter, Disney reported that its domestic park revenues were up 3% but profits declined 2%. That's a reflection of the discounting. But it's not just rebellion against Disney and its prices. Universal, Cedar Fair, Six Flags and others all reported declines compared to the prior year. And they'll all bounce back when inflation subsides, new attractions open, international airfare continues to rise, people tire of whatever alternative plans they are pursuing now, etc. Post covid "revenge travel" drew a lot of infrequent visitors to Disney destinations. Many can't afford or don't want to come back year-after-year. But it will come around again.