Yes, he "avoids" taxes by using every legal strategy available to him, as does every single person who pays taxes. This is called "paying the correct amount of taxes you legally owe".
> Anything that maximizes his personal wealth could very well be hostile to the well being of the country.
Let's look at the things that have maximized his personal wealth:
Paypal - made online payments popular and safe. Enabled millions of people to start online business.
Tesla - made electric cars popular. Reduced C02 emissions. Gave thousands of Americans good jobs. Made many employees and investors rich.
SpaceX - re-ignited space exploration. pioneered re-usable rockets. Dramatically reduced the cost of launching satellites.
Starlink - brought Internet access to rural areas.
Please tell me, which of these personal wealth maximizing activities has been hostile to the US?