The second is probably unsystematic play. Let me make a reservation that I do not mean casinos, as well as people playing "for fun". I mean sports betting.
So, how much did your mistakes cost? Did they cause you a serious psychological blow? What were your mistakes, did you learn from these mistakes and do you apply this knowledge in practice now? Were these mistakes simply painful, dramatic or catastrophic?
Well, I have always wished my excessive gambling cost me only money, but sadly it cost me much more than that. It cost me several opportunities I would've taken up as a vibrant younger man and made exploits earlier in life because I had the full energy for taking up challenges, but I ended up taking virtual soccer and rollover challenges, including using high stakes as a means to attract huge wins. What pains me more is the opportunities I missed and that was the reason of my depression back at 2018.
I learned the hard way, had to pick up my career from where it hit a rock, all thanks to gambling. I avoided gambling for a couple of years and made several resolutions which kept me gambling responsibly up till today. I'm doing pretty fine now, I think the lessons was well learned.