No, Prayers are not answered all the time.

Priests and pastors have been telling people why prayers are not answered.  So far, I have not heard a truly good explanation.

"All prayers will be answered if they are prayed according to God's will".  Are they?

I note 2 obvious scenarios where, even if the prayers are 'according to God's will', they are not answered.

1) Even if it is according to God's will, if sinful humans mess up, the prayers will not be answered. For example, at every weekly mass, devout Catholics pray for their pope, bishops, priests and religious.  Yet in some countries, the church is filled with some priests who are also paedophiles.  Yes, prayers by devout Catholics for God's blessings on their church leaders are according to God's will.  But God would not answer these prayers to bless the sinful ones.

2) Even if it is according to God's will, if Nature mess up, the prayers will not be answered.  For example, Christians pray for peace all the time.  They prayed for safety when a disaster, could be a hurricane or a typhoon, was expected.  The disaster did come, and many people perished.  Surely it is according to God's will for His people to live safety.  But God also allowed Nature to exercise its freewill.  God would not go against the fury of Nature most of the time. Hence the prayers of the devout were again not answered.

I must add that, God being all-mighty, could of course override the sinfulness of men or the fury of Nature, and answer all prayers for peace and for well-being.  But usually He allows the free-will of men and Nature to prevail.  However, once in a while, He may do otherwise.  We do not know when.  It is a mystery.