Successful in trading after following your own strategy?

I am coming up to 8 years of trading now, of wich 1 year profitable.

i only started to become profitable after giving up and then i came back with one idea that turned out to be the clue for me to become profitable.

My route to profit:

1. try everything, because you don't know what fits you. crypto, stocks, forex... daytrader/swing or investor
2. give up. no one can be a real trader without quitting at least once.
3. come back and make it
4. dont give up

Now i have created my own strategy with my own indicator and it works.

i have followed courses, gurus and whomever. you just have to experience it all to find your route, asset and strategy that fit together.

Now i only trade eurusd and my strategy and it works.

What is your experience? do you agree this is why becoming profitable takes so long? because you have to find your own way and try everything.