https://wizardofodds.com/games/blackjack/strategy/4-decks/
It looks like you are using Martingale strategy here which is way too risky since I have encountered pretty long loss streaks while playing Blackjack on many occasions on Stake and other sites.
You are right that the use of martingale is dangerous because I have failed several times to use it. But I can't do anything because this is my only strategy now that sometimes and even works more often.
A lot depends on luck. There were times when you play for a long time at a small rate, and nothing can be raised. It would seem that everything is already and then you bet at random to the maximum, as much as possible. And here she is fortune. Several times I have succeeded. The main thing at such moments is to stop in time.