As a freelance I pay 5% until I reach an higher level of income and I'll be able to pay more taxes. On top of this there's 21% for retirement contributions.
Is there any other country where a lower amount of taxes is paid?
"Regime dei minimi" is a taxation level available only if you bill not more than 30'000 €/year. Note this is not net income, but gross income.
So you go down to 22'000€ after taxes (21% + 5%) and then you have to take away your own costs, and then you can keep some money for yourself. Also, if you live in a big city (let's say Rome or Milan) that is definitely not going to be enough to live a peaceful life and raise a family.
Oh, but that's a secondary problem: the first one is finding clients that are actually going to pay you in full.
If anything goes wrong laws take ages and the cost of lawyers and time spent in court vastly overcomes what you're losing.
If you are a company in Italy you pay high taxes and you are less competitive.
If you are a freelancer in Italy you are more competitive than other countries
That's the point of my post:
Incorporate your startup elsewhere and hire in Italy
There are plenty of them.