Unfortunately, your luck hasn't changed with some safe selections. There were more than 4 goals in the USA vs Belgium match. I have decided to take a little break from Jackpotter after losing most of my deposits.
When luckiness went away, trying to be more careful, selective and outsmart the bookmakers won't help us winning. It's hard to accept but life is like that generally with with gamblers their bet practice is almost the same in most situations.
It's not because you bet at Jackpotter and the casino is not responsible for your losses but if your bad streak does not end, you will have similar results on other casinos with sports bets. I agree with your decision, that is taking a break before consider of any return in the future.
I didn't like some features of Jackpotter. They charge higher withdrawal fees for all the crypto. The fees aren't huge, but are quite higher than the actual network fee. Jackpotter in-house games have higher HE than the other popular casinos in-house games, but the wager on in-house games have only 25% contribution towards the VIP ranking system.
Your opinions are like contributions from user community and Jackpotter will need to forward it to their product development team as well as marketing team for internal discussions before any changes applied in the future. Having good programs for users to join, maintain existing loyal users as well as turn more users to loyal ones and get more new users will be very important development tasks for Jackpotter's teams but it's very important task.