If it were me I'd would just chalk it up to experience. You were
in the pattern observing the runway the whole time and did the
appropriate "go-around" when necessary. That is exactly what you
train to do all the time as a student pilot... for just such situations.

Now if this particular pilot (or airplane) were known for this
sort of thing then I'd say go for it. I've has a couple of similar
situations occur at an uncontrolled airport myself but that's
what staying visual and avoidance is all about.

I may be in the minority but I'd say use it as a learning experience.
If you fly enough hours something similar may (will?) happen to you
(and hopefully nothing MORE serious). Just my $.02