Why would you say that? They all had the same $$ thrown at each automobile.
The biggest subsidy Tesla ever received was their $0.5B ATVM loan, which they paid back 9 years early in 2013. Ford received 12 times that amount, $5.9B, and never repaid it. Nissan received $1.4B, and repaid it in 2017.
The ATVM definitely helped them get off the ground, but it was a loan, not a subsidy.
After that, there were the customer incentives to buy EV's, which was applicable to the first 200k vehicles sold by each manufacturer. This was $7500 paid to each buyer, not to the auto makers. Tesla crossed that threshold way back in 2018, so
none of the vehicles they sold in 2019 - 2022 were incentivized by any consumer tax credit, and those were some of their biggest growth years.
For some stupid reason, the credit was extended after 2022, which seems unnecessary at this point. There are plenty of interviews to be found, in which Elon was arguing against the extension of this tax credit, saying it was a stupid waste of taxpayer money. Of course, he knew it would benefit his competitors much more than it would benefit Tesla, at that point in time.