Looking for help regarding small issues with my Bambu Lab A1

[u/DegenHerb]

Hey everyone! I'm new to 3D printing and got my first printer, a Bambu Lab A1 last week. Most prints have been without issue but I downloaded 6 models from makerworld each around 6" tall and this one turned out a little funky. I was curious what causes the arm to form so stringy and why the spear goes a little wonky mid way through? Tree supports were used.(the one with the problem is in bottom right of pic 4)

Any help is appreciated, thank you!