Why did Trump rate his aide Lindsey Graham, who died recently, 99.9 out of 100?

US President Donald Trump said he would rate his aide Lindsey Graham, who passed away due to a sudden illness, 99.9 out of 100 due to "one bad moment". Trump said Graham had criticised him after the January 6 US Capitol riots in 2021. Graham was among some Republicans who briefly rejected Trump as their party's leader after the riots.