Why not make yourself happy? But maybe you want to be unhappy.. like 5 ZN contracts on a tiny account, thereby virtually guaranteeing a blow-out (if not today, then tomorrow). You've heard it before... 'you get what you want from the markets'. You are getting what you want.
The amazing thing is you have learnt a lot technically. The skills are there. However the winning attitude isn't. Thus you are losing.
Here's something that will work, providing you really want to become a winner:
Right now you are focusing on how small your account is. You are thinking you need to triple it to trade your systems, but you are sub-consciously focusing and worrying about the "small account" or blowing up, so a small account is what you get.
Instead try this: tell yourself "if I can prove I have a good equity curve with small drawdowns from now till 31 March, I will be able to find investors / borrow money / find other ways to massively increase the account. All I have to do now is trade correctly, manage my risks and build this track record"