When they tell you that succulent plants are easy to grow, and will take any kind of abuse and laugh at it, don't believe it.
There are a few ways to kill off succulents.
One is to keep them in a dim room and not give it enough light.
The other common way is by the wrong watering regime - meaning at the wrong time.
The other way is to water them incorrectly.
There's a theme here. Succulent plants are not as care free as they're made out to be, but with some guidance, you can grow them successfully.
Succulent plants originate in dry climates and have evolved to deal with drought, but with the ability, and need, for some periodic flooding.
If you can copy this by the way you water them, they'll be happy and healthy, all other things being equal.
It goes against all of our nature as good plant moms to deprive plants of water, but when you remember their origins, you can feel better about being cruel to be kind.
Other things to remember; don't let pots of succulents sit in a saucer of water. They have extremely fleshy roots in some cases, so excess moisture in the soil will cause them to rot.
Use a potting soil that has water holding polymer crystals - this way, even when the soil is bone dry, it will be easier to re-wet it. More on soil for succulents here.