In my opinion: when you could be paying tens of thousands or more to support others, instead you are paying $0, and you know other people who barely make half the median household income are paying 20–30% of their total income.
Do these rules exist for other people? Yes! Is he possibly only taking advantage of what others allow him to do? Sure! Is it still selfish and trivially anti-social? Yes.
If they made it legal for billionaires to steal cars off the street, it would still be shitty for them to steal cars.
If you make half the median national household income, you’re making about $30K, and your effective federal tax rate is barely over 14%. Your 20%-30% scenario doesn’t seem to add up.