A block on Bitcoin blockchain contains about 4000 transactions.

Since a block is added approximately every 10 minutes, in 3 months, about 51 million transactions can be added (4000 x 6 x 24 x 90 = ~51 mil)

A bad actor such as a government could post transactions for full capacity for 3 months with a fee of $50 per transaction (currently avg trx fee is $1.3), costing the government about $2.5 billion and causing a DOS (Denial of Service) for all other transactions (Assuming that "miners" prioritize transactions with higher fees).

Can Bitcoin network handle such an attack?

P.S. $50 fee is just something I made up for cost to government calculation and can be any number that is way higher than the average fee. Point is to make "miners" ignore all other transactions that have lower fees to cause a DOS.

Also, please assume that government would prepare for this scenario by first creating millions of addresses and placing some sats in them so that transactions during attack would look like legitimate transfers.