I have done many mistakes that prevented me from winning big amounts, the worst one was a zero bet on 10000x limbo multi while I was trying to bet $3. The last misclick happened 3 months ago, I accidentally clicked the max bet button next to the double button on the gambling website, and ofc the result was 0.2x on plinko. Such things can happen, what we can do is to be careful and enjoy gambling as a fun activity while hoping for the best. Just my 2 cents.
Yes, for me the thing that prevented me to win is my emotions, I easily get carried away by this and make me feel frustrated by days and sometimes I tend to bet more and more so that I will get back what I lost . But this kind of mindset just set me to larger debt but now I remove that kind of thing and me better gambler now because I can now manage my emotions and it is not a problem anymore.