Hi Dipak, yes i totally understand what you are saying here, stick with it and just keep working on those areas and shots that make a difference.
Ok so dignics 80 is a great rubber,in comparison to tenergy 05 it is slightly slower and of course a harder sponge. It has more grip and control in my opinion and I feel is more suitable for a backhand rubber,however both sides it is capable of a lot of spin quality and high control compared to its speed. Its definitely less springy than tenergy and may even feel like more effort to generate power.
Hope this helps!