You’re dodging now. South Korea isn’t there same dictatorship now as it once was and had multiple, multiparty governments, all of which elected democratically since 1980s.
The US has had peactime control of the Korean military until unilaterally given the peacetime control to ROK in 1994. In 2000’s, they have had discussions then for ROK to also have wartime control of the army, but then delayed due to North Korean posturing. This has been delayed yet again in 2015. If you read the article I linked or know the actual history, you would know that. So now, why is there still delay and why do you think US pressure has to do with it? How is the US doing this, even though in 2015 the Obama administration has gotten frustrated with the delay?