Is the Catholic faith essentially polytheistic?

The Oxford Dictionary defines a god as “A superhuman person who is worshipped as having power over nature and the fortunes of mankind; a deity.”

To qualify as a saint, under Catholic doctrine, a person must have at least two verified miracles to their name. If sainthood and performing of miracles is not a status applicable to all (or at least a significant proportion of) humans, then it is superhuman, and performing miracles is having power over the fortunes of mankind.

As such, are saints superhuman enough to qualify as gods? If the Catholic faith says that prayer to saints is not blaspheme, does that make them polytheistic?