Welcome xaratustra. I think you over-rate the importance of originality in philosophy. There are genuinely original papers such as Russell's 1905 paper, 'On Denoting', but a good philosophy paper can have many virtues besides originality.
For instance, a paper might reduce ideas and arguments to coherence. A service is done by organising disconnected material into a logical arrangement. This exhibits analytical power which is valuable and quite distinct from originality.
A philosophical paper can also revive a topic or problem which has fallen into neglect. If you come across a book or article, perhaps from some time back, that addresses interesting questions to which attention isn't now being paid, by reviving the topic or problem you produce a valuable philosophical paper. No originality is involved.
Also I see philosophy as a personal enterprise, a way of inching towards clarity about some topic or problem that I care about. In this spirit the American philosopher, William James, described philosophy as a 'dogged struggle to achieve clarity' - clarity in his own mind. I use whatever materials are to hand in that dogged struggle. What matters is not whether the material is original to me but whether it helps in the struggle.