how to change an karmic pattern or get rid of it actually?
what is your advice on this...?
in my experience some of them are so deep that can't change only by doing something else to break the pattern...
As you IMO correctly put it, Karma is a pattern not a law.
As you continue in a pattern the "world" responds in its pattern and ends in the same results.
You have to change your pattern. This is not easy as your pattern of actions is what it is because it is comfortable for you. You get some physical/mental comfort from your pattern of actions.
You have to be willing to be uncomfortable, perhaps uncomfortable for a very long time. A majority of people will prefer their comfort.
I'm not judging, I prefer my comfort.
I suppose I am grateful my pattern of comfort doesn't get me into too much trouble. Others aren't as lucky.