Disease modifying drugs are not a cure for MS, but they can reduce the frequency and severity of relapses. If you experience relapses these drugs may help, but they are not effective for primary progressive MS.
It can be frustrating if treatments aren't suitable for you or they don't work as well as you like. Lots of people with MS find it useful to actively manage their health.
Depending on what symptoms you have, there are different ways to manage their impact on your life.