Umm help im getting owned (not spam dont ban me)

So i go get my slayer task ooO greaters go take 22 sharks kill 150 no probz go back to my slayer master killwatts grr theyr anoyin but only 54 ill do em i got back and fire giants o good theyr like 110xp per lalalala cook myself some sharks tele house pay the man and start fighting fight 1 hits a 11 on me oo didnt hit nothing more on me fight another hits a 10 on me and a 5 erm wth every 1 or 2 giant is hittin me iv onyl killed about 60 and im down to 6 sharks iv got my rune and obby set with me +240 def bonus so why are they hitting me so often do they do this to everyone or do is there soem way to prevent this i know some monsters theyr melee but magic based so are they one of them monsters should i wear black dhide r do they just have high atk and im basacily just whining about nothing
(sorry again if this is considered spam)
(dont ban me please :( )
And please try to help me usualy nobody replies to anything i ask lol
sorry for anything iv done thats made you hate me :'(

They're just strong.

arent they the ones where your better off with d hide armor amd some sort of shoes?

I dont know :p thats why im asking
(sorry if thats going off topic it wont happen again i swear)
Hmm i nealy died so i left but im goin back now got like 90 left to kill

thats about right and no its better to wear metal than d hide

im sure it was d hide

Oooo just got 80 def combat 99
(sorry its not off topic coz i got it at fire giants dont ban me :( )