Strikers Seasonal Form UP & Down

Season 21:
Striker 1: Top scorer in Season 21

Season 22:
Striker 2 Youth Academy: Joins Season 22
Takes over the Top Scorer from ST1. And ST1 had a bad season with half amount of goals than last season

Season 23:
Striker 3 Youth Academy: First Cup game 3 Assists
Striker 2: Dip in form, couldn't score in 2 games yet including 3 free kicks
Striker 1: Started scoring back.

Am I seeing a trend here. What could be the solution?
Sell Striker 3?
Tips will be appreciated.