Freight train interference — a dispatching decision made by a freight railroad to delay Amtrak passengers so that freight trains can operate first — caused 1.1 million minutes (about 2 years) of delay in 2022. [1]
[1] also lists Percentage of On-Time Customers by Route – 2022 which clearly shows that it's abysmal.
See the report card [2] where they have put in 80% as the benchmark.
IIRC, I had also seen a full historical report across multiple years but can't find it now. We recently did a trip going from SFO to LAX to San Diego by Coast Starlight and the Surfliner. Thankfully I had read these reports and dropped the plan to do the Zephyr as it has only a 25% on time performance (in 2022). It would only be slightly better as 2022 reports state it has deteriorated further as compared to 2021.
The lesson we learn from looking at all this on time data and checking out some other forums was that when traveling by Amtrak, budget for delays, cancellations, re-reouting by bus and all the pain that comes with it.
We come from the UK and are train lovers, having done most of the train travel in UK and Europe, Amtrak has a lot to do to catch up.
[1] https://www.amtrak.com/about-amtrak/on-time-performance.html
[2] https://www.amtrak.com/content/dam/projects/dotcom/english/p...