It's usually either because the mechanism the door handle operates is starting to sieze and because the handle is a cheap casting, it can't cope with the extra stress or the door latch isn't aligned properly making it harder to release.
I know it's a pain but ideally you need to remove it to clean and lube it before replacing, or at the very least lube the mechanism in situ and make sure the latch is lined up correctly.
Last edited by Keef on Tue Feb 05, 2019 9:42 am, edited 1 time in total.
The answer you seek is in your question You are using shitti ching ching China man door handles or "aftermarket" as you call them Made out of thermally treated yak sh*t Try a Ford one
get the door open, get behind the panel next to the shock strut and there are three bolts, another two behind the mirror on the outside, loosen these. close the door, tighten bolts, see if it improved.
Drab green Transit 190 L High top minibus turbo conversion with toyosports intercooler
I found on mine that the linkage that goes from the handle to the locking release needed shortening a couple of millimetres due to wear in the nylon fittings at each end. To do this I put a slight bend in the linkage to make it shorter - getting to it is a pain as you need to drill out some rivets that hold a shielding plate that covers the area.
I had to pull the handle to its limit for it to release the latch and I suspect this may be what is happening with yours - now I can release the door latch with minimal movement of the handle.