Thanks for the clarifications, OP. 2-5 games are usually folks with better skills and experience than 1-2 , not everyone, but most. There are also always a few dumbasses with a stack of money to light on fire at most 2-5 tables. Your problem likely is that you are not really skilled enough YET to be a consistent winner at those stakes. With only 6 months experience this is NOT unusual for most folks.
So why not drop down to 1-2 and see if you can recover some confidence in your game? If that does not work out for you , then consider another hobby with less stress.