I haven’t seen a single advertisement ever about the holy grail. I have not seen a single definition about it either for that sake.
My turning point was watching the right YouTube channels (the not so popular ones). Also I learnt so much from my backtesting. I did backtesting and it was not profitable. Then I found out if I add an extra indicator that will filter out some bad trades. Or I entered on second candle or I needed price above or below a certain point before entry. So that has been the important thing for me. Getting to a strategy that works. The trading psychology has never been a problem. Almost since day one. You will have losses. You will have trades that miss profit target by one pip. You will have trades that hit your stop loss and reverses by one pip. It is just the way it is. Get over it.