Engines fail in flight all the time. They rarely make the news unless something major happens.
The CFM has a failure rate of 1 for every 333,333 hours (38.03 years), and the record time on wing before the first shop visit is around 50,000 hours.
This lawsuit is nothing more than greedy people trying to ride a gravy train who’s using data from 40 years ago when the CFM’s were first fielded.
I’ve noticed as a frequent flier that Southwest Airlines’ overall culture has changed under its latest round of leadership...and they have run into more maintenance problems in general.