If you don't want to move: Talk to a good accountant or tax lawyer in Germany about how you can reduce your taxes. It should be someone specializing in tax optimization. Only work with licensed lawyers or tax advisors, avoid people without a license.
You will still be paying a lot of taxes - but possibly a lot less than before.
Otherwise if you really want to save a lot of taxes, you will have to move to a different country. Then there are many options.