Why Rhyu Si-min is an all-time villain

The one who worked hardest at selling Yoon Suk-yeol --> Rhyu Si-min
The one who blocked the vetting of Yoon Suk-yeol ------> Rhyu Si-min
Recommended Cho Kuk as Minister of Justice -----> Rhyu Si-min
When Cho Kuk nodded along to the claim that
the delinquent Yoon Suk-yeol was his first son --> Rhyu Si-min
The one who snitched on Lee Hae-chan was Rhyu Si-min ---> Talking about Advisor Lee Hae-chan
while pretending to be innocent

• It was the same with Roh Hoe-chan, but he thrives on the remains of the deceased