I don't think this is a fair representation of Lion Air's record. Prior to this, their last fatal accident was in 2004. And all of their incidents are fairly common occurrence among airlines all over the world, including here in Malaysia.
I think it's more to do with near misses and poor management.
"However, it has struggled with issues of safety and poor management and was banned, along with other Indonesian airlines, from flying into European airspace until 2016.
Its first deadly accident in 2004 saw 26 people killed and more than 100 injured when a Lion Air plane skidded at an airport in the central Java city of Solo, with the airline blaming bad weather and strong tailwinds.
In 2013, a rookie pilot at the controls of a Lion Air plane undershot the runway and landed in the sea off Bali, splitting the plane in two and forcing passengers to swim to safety. Remarkably no one was killed in the accident.
Three years later, two Lion Air passenger planes clipped wings as they were about to take off from Jakarta’s main Soekarno-Hatta airport."