Its not common that mobs are spawning, I needed stack of string and it took to me 2 days (without buying) to get the string.. So what is your choise? Stay on what difficulty? easy or normal? to get more mobs or low amount of mobs?
The server's hostile mob spawn rate has been lowered for quite a while now. That's why it takes so long to gather mob drops. I'm perfectly fine with easy difficulty. Also, is it possible to change the difficulty on the server without resetting anything? And as a last remark: grammar. Please use it.
Im still learning english, English isnt my main language. Im from Israel and if you didnt know the main language is Hebrew so thats why my grammar is not the best.