I remember him making a lot of noise about making insulin super cheap or giving us the best and cheapest health plan to replace obamacare, he had a full 4 years

I remember him making a lot of noise about making insulin super cheap or giving us the best and cheapest health plan to replace obamacare, he had a full 4 years in office to accomplish this, including two years with complete control of congress. So what exactly did he accomplish?