All traders have experienced the same thing as you, whether you admit it or not, I'm sure we have. When we get consecutive profits then we continue to trade and experience consecutive losses too, this is actually about controlling emotions and discipline. I also often experience the same thing, but after learning from experience at least I can control myself and can manipulate losses when getting profits stop for a while, and vice versa. Because traders when emotions are unstable greatly affect the decisions taken.
At least we as traders must have principles like this, can create a simple trading strategy, can control money management from strict risks and can control emotions to remain stable. Rather than you have many principles of many trading strategies, can't do money management, loose risks and emotions still go up and down. It sounds simple, but it's not that easy to do. However, if you are consistent and disciplined in implementing this, mistakes like that will not happen again.
At this point, we can assume that this is just how things work in the market and just ignore it emotionally. Financially you may not ignore it, of course you need to do better and learn from it, but the fact that you may lose money isn't really that much of a big deal, it is common and not a big deal at all.
I understand we can see this as a good thing for the long term and if we can do this, then we are going to make a lot better approach on the long term as well. This isn't that complicated of course, and if we can make this work, then we aren't going to see any major flaws in the future. As long as we do fine on the long term, that won't be a huge issue isn't it? I agree we should stick to what we know and our principles.