I don't regret it as I never felt bad gambling except the few times that I overdid it.I know it is my responsibility to behave correctly,to know when to quit and not go deep down to lose money I cannot afford to lose as that would only bring negative consequences.Based on this I think that it depends on people character,the ones with a weak one most probably regret it a lot while the people with strong character are the ones who don't care what happens to them as they are strong enough to overcome any situation no matter how bad it can be.
Anyone whose intention is to gamble be it for fun/entertainment or as a source of alternative income which is not encouraged should spend more time planning, scaling, setting limits, researching, and executing in Small Amounts. And Loosing first time lots of money is a good lesson. Loosing at first will leave you with a lasting impression and lesson about gambling that winning at first. Do not ever keep gambling without a strategy put in place.
While it depends on different categories of people, we need to understand the type of gamblers who fall for these mistakes of regretting the act of gambling. The lonely players tend to regret gambling, newbies without strategies also regret failing too many times in gambling, and those with a lack of self-control. Many other people can regret gambling, but we can interlink them according to their behaviors and childhood neighborhoods or even family rules. Some kids who grew up around gamblers, even without research, would think gambling is quite a good money-making method. If the player doesn't win enough money or loses his money he'll feel a rush of regret on his brain. Some might end up crying or feeling deep remorse for spending their money with no caution. Hence, I'd say that those with strong character, are responsible gamblers who play to enjoy the process. And doesn't care whether they'd win or lose. This means that such a player already budgeted some money for gambling and it won't affect his financial responsibility. While those who regret gambling, may be close to problem gambling, they still need some gambling orientation like putting a strategy in place, before gambling.
Moreover, a gambler with a strong character can still regret his action, if he's faced with some problems, which led him to gamble irresponsibly. It's rare to maintain our self-control in all situations or conditions in life. Many people who never gambled for the first time, spent money in gambling because of a piece of sad news or depression. And the gambler with a strong character isn't exempted. As gamblers, we can't detect for sure, when we'll make a mistake or have a problem gambling. And when that happens, we have to regret our actions. The major problem is having to regret every single time we gamble. Which isn't great, but sometimes every gambler will regret making a gambling mistake. Hence, my advice would be for gamblers to control their actions or decisions, not to repeat a mistake over and over again.