Infernal weapon luck

[Brimmy]

http://imgur.com/MdEdPko 

So i am a blade master who has a job at Tomb of the exiles. So here you can see "big" picture of how many weapons and what kinda i got from chest but still not for my class. Is this rng alright ? To spend so much keys and so much time for this ? this ok xD . I' m going mental, do I look like a Korean to you ?? xD