To clarify: this is not intentional art. This is an engineering edge case turned real by bad luck.

Normally 3 buses can use around-about without issue, and there's plenty of 4 bus patterns that could use the intersection without creating a knot, so bus drivers probably aclimate to having another bus or two in the loop, but this just happened to have the bad luck needed to create the knot.

(And OP is calling it an art installation tongue in cheek because it's not going anywhere for a while)