don't sell your work short. it has value because it comes from you, and struggling to finish is unbelievably common in the creation process - not to mention frustration and a lack of joy.

if you're creating because you feel a drive to create, you are making art and that has intrinsic value to yourself and others. if however you are performing the act of musical creation as a means to an end, what you are doing may be better considered work and not art. the work of others can also be appreciated but it is different.

keep at it though. you are asking good questions and unlike many you are also personally engaging with them.