i know what you mean bout 100g oats!!
i used to struggle with em but after a few weeks i got used to the amount, now i look forward to em!
i understand that oats do contain some protein, but i think a source is needed with high quality protein in it.
im not sure if its the right approach and many people will probably disagree but i wouldnt really count the protein from oats, i tend to treat them soley as a carb source and rely on the majority of my protein from animal sources and some supps.