Opel Corsa C Handbrake Performance Issue: Comparing with Corsa B, Cable Adjustment & Drum Images

I warmly welcome.
I have Opel Corse C.
From the very beginning, the manual does not stop me as I would like. As I stand on the hill, I have to pull it very hard so that the car does not come off.
I thought that this type has it.
Recently I rode the Corsa B and there, after pulling the brake one hand I was able to block the rear wheels on the asphalt without any problem.

I noticed that every now and then I have to crank the cable at the hand brake because the hand catches higher with time.
I put pictures of the inside of the drum in the attachment.

The drum is coming in tight (the edge of the hopper hopefully on the drum)? Because it has to come in contact and not loosely - of course from both sides.

Self-regulation works? I mean, it must be regulated as tightly as you want it to catch it quickly, not just.

1. Is the link ok, I like to wipe and pull out after years?
2. are the cable guides (the plastic ones on the rocker are good?)
2. the thickness of the drum I think is also not without significance.

You can try to pull the link from the side of the cabin