Your post is everywhere xD I’ll try to give a response. There is a lot of worries coming from here.
The first thing I thought is that it might be a ‘focus’ issue. I am not sure how advanced a practitioner of meditation you are, but I would advise practicing on something that will focus your mind and attention to one point. Like just breathing. In and out. No need to hold your breath or do a certain count. Dont worry about energy work, or seeing colors. Just feel the breath and focus on that. See if you can do that, just breathe, for 5 mins. Then move to 10. If you don’t want to focus on your breath, you can use an external object as well. IE- a candle. Just watch the flame. The point is to train your mind and your ability to focus.
Getting frustrated is not going to help. You should be gentler with yourself. In my training, I was not even introduced to applying color to chi until the very end of my second year. Colors are powerful. A lot of people have trouble with visualization and holding specific visualizations for a period of time. Things warp and change because the mind is not stilled.
Before you start some energy work, it may help to have a ritual to cue your Sub-C into what you are going to do. It could be something as simple as taking three deep breaths, or putting on a certain track of ambient noise, to having a cup of tea (which can be charged to help cleanse and clear your physical and energetic bodies). Just be sure it is something you can do every time before you practice. You will find having a ritual will allow yourself to get in the groove and fall into an altered state more quickly because your waking mind and unconscious mind both are in agreement as to what is going to happen next. Its like priming the pump.
Everyone picks up psychic shit all day. Its part of being alive and human. Impurities exist within us all, even the most dedicated practitioners.
At least you are recognizing the negative feedback loop you got going for yourself. You’re eating yourself xD So stop it.
That aside, I think you should take a step back and just breathe. Literally. There is a lot of anxiety and perfectionism gleaming through this post. You are being too hard on yourself. Visualizations are not perfect, but they only get better with practice. Having a sharp mind, hence the meditation I suggested at the beginning of the post, will help you get the colors right.
You may even want to try some basic visualization exercises, such as picturing an apple in your head for 5 mins straight. Basic fun things. Have fun. Don’t give into frustration. Give yourself a chance. Then even more chances. You’re worth it, as is your practice.
This may be boring advice, but I try not to look too deeply into things (OMG its black!!) especially when you are just beginning a practice. A lot of the times, the practitioner is their own worst enemy, and that can be compounded by other feeding into that belief as well.
If you are interested in energy work, there are ways to do it without working with chakras or colors for that matter. A practice I greatly benefit from, and I advertise like mad on here, is qi gong. Specifically the zhan zhuang style (though there are hundreds of different ones and each have their own quirks. I have too many books xD). It is easy to learn, works the entire energy (and physical) body, you picture balloons (how fun!), and you will be able to feel the effects of your efforts within 40 days of daily practice. Its simplicity is what makes it great.