The opening is not the problem. You first need to be able to find better moves from your chess understanding, your skill in calculating lines of play and your positional judgement.
If you are weak in those areas then no amount of memorisation of opening lines will be of any use to you.
I agree. This is one reason that I have chosen to study the London system, to force myself to play better positionally instead of playing tactical lines all of the time. The point of the London system is not to have to memorize isn't it?
The opening is not the problem. You first need to be able to find better moves from your chess understanding, your skill in calculating lines of play and your positional judgement.
If you are weak in those areas then no amount of memorisation of opening lines will be of any use to you.