everytime i try to learn kotlin, i can only think WTF is happening, why should it be happening?

after wasting last 4 hours, i came to this conclusion table regarding kotlin var and val notation.
And now my fucking compiler is saying that i can rather write :

val x:Int

and initialize it later, when i thought val is immutable and must be initialized at the beginning only(like public static final int x =5)

Who the fuck are those people that like this stupid language? why would you say some variable as immutable(meaning which can be changed 0 Times "ONCE" ASSIGNED A VALUE ) and when i can create a program with a variable that never got ASSIGNED A VALUE EVEN ONCE??