@EvoFaith I believe Scripture teaches that as long as we do something in faith and unto the Lord, then Christ is honored. So whether we keep Ash Wednesday or choose not to keep it, as long as we are serving Christ and honoring Him all is well.
From a rational perspective, it is an instance of the genetic fallacy to say that because something originated in Catholicism it is necessarily wrong. Even if we concluded that Catholicism is seriously misguided in multiple ways, we could not therefore conclude that everything they do is unhelpful to our spiritual growth. Each spiritual practice would need to be evaluated on its own merit and the benefit we find in participating in it, assuming it does not violate any Biblical principles.
Christ grant you wisdom
Romans 14:5-8 - One person considers one day more sacred than another; another considers every day alike. Each of them should be fully convinced in their own mind. 6 Whoever regards one day as special does so to the Lord. Whoever eats meat does so to the Lord, for they give thanks to God; and whoever abstains does so to the Lord and gives thanks to God. 7 For none of us lives for ourselves alone, and none of us dies for ourselves alone. 8 If we live, we live for the Lord; and if we die, we die for the Lord. So, whether we live or die, we belong to the Lord.