Taxing the money on everything is the government's job to make money and make things worse for the people.
Each country has its own rules regarding gambling tax. There are countries where you have to pay tax on the profits per month. In month 1 - 100,000 eur profit, and in month 2 - 90,000 loss, then you will have to pay something of 29% tax from month 1. Count out your profit. But I don't know to what extent governments are actively involved in checking such matters.
I'd say the government are being greedy if they have that kind of huge taxes, it's only the gambling sites that makes consistent profit here, for gamblers, we don't one day we make big profit, the next day we could lose it all together with our fresh capital, so it doesn't make sense at all.
should really be on that considerable side where it wouldnt really be that too much and wouldnt really be that too low because this is still a business and that one hadnt been built just because of paying up taxes.
10-15% is considerable but going above that percentage is already too much. If business owners wont really be dealing on that new agreement then say goodbye to their business.