Compared to other public school districts, they aren't bad. It's just that "other public school districts" isn't exactly a great baseline. The truth is that the school district personnel have very little to do with this, and the average income level of the student body has a ton to do with it. I'm in a wealth school district as well.
I live just over the county line from Boulder (I can get to Pearl Street in 13 minutes), and the BVSD is very overrated. They were closed for far longer than other districts were last year. They have a lot of money, but also a ton of wealthy students with overly permissive parents who bring drugs into the schools. (I know the vice principal of Fairview High in Boulder, and the incidence of drug use in the school is mind-blowing, all courtesy of rich kids with rich hippie parents who give them allowances of hundreds a week that they buy drugs with.)
One issue prevalent in all public school systems, but particularly bad in BVSD, is the number of students being falsely classified as learning disabled. Many kids with highly inattentive parents, who are essentially babysat by iPads and video games when at home, are labelled as LD/ADHD/etc when the reality is nobody makes them do their homework or study at home. They are then, due to the disability diagnosis, allocated disproportionate resources and staff to try to bring them up to average level. These resources come at the expense of gifted programs which have fewer seats available than they otherwise would for advanced students with good parents. At the end of the day, most public school systems in the US are investing vastly more resources into bringing poor performers to average than helping gifted students reach their actual potential by actually challenging them.
I view them as institutions which are, at a functional level, primarily incentivized to serve the needs of their employees over those of their students. They are a massive source of union jobs, and these unions are the largest funders of politicians who then increase the budgets that then fund the unions via wages to members. I'm a huge fan of unions in non-monopolized industries, but like FDR, I vehemently oppose unions for public sector employees for this very reason. I pay these idiots whether I want to or not. And my wife and I were emotionally crushed when we saw the horrific, and frankly sloppy, remote learning that was taking place. The curriculum was terrible, the teachers were not engaged, and it just felt like too many were taking advantage of the WFH to fuck off and indulge their hobbies and personal lives. This was a universal sentiment amongst the parents (and hilariously, the middle school students) in my daughter's school. There was not a single remote learning lesson I witnessed that was remotely as effective as a Khan Academy course. We know this because we ended up supplementing her lessons with Khan, and she was very emphatic that she liked them a million times better.
I know many on HN will disagree with my sentiment, but I've noticed that the people in my friend group who don't share my view are disproportionately childless. People with kids in school tend to be pretty frustrated with the structural deficiencies of the fossilized, mid-20th century institutions that are US public schools.