“Mattias did little or nothing, Saul(Paul) did very much..”
To be sure, Paul was quite prolific.
But I’m sorry you find the Lord’s choice of Matthias a disappointment.
Mattias was chosen by men.. as scripture(NT) suggests..
When men take the Holy Spirit out of the loop.. the loop becomes a renegade church.. or Sheep Pen(John ch 10).. that the Shepard must call the Sheep "out of".. and has been doing for almost 2 thousand years..