Some Protestants are against calling clergy "Father" like Roman Catholics call their priests, but some Protestant pastors think of themselves as spiritual fathers. A RC replied when asked about this and said you shouldn't call people Mister since it means Master, the word comes from the word Meister in German which means Master.
A Seventh-day Adventist brought up the RCC practice while talking about RCC being a beast or something in prophecy, so they are against it. (Some SDA are against being called Reverend citing Psalm 111:9. Psa 111:9 He sent redemption unto his people: he hath commanded his covenant for ever: holy and reverend [is] his name.)
Some verses and reasoning against calling someone Father.
Mat 23:9 And call no [man] your father upon the earth: for one is your
Father, which is in heaven.
Mark 10:29 mentions father, but Mark 10:30 doesn't while it's missing in Mat 19:29.
Mat 19:29 And every one that hath forsaken houses, or brethren, or
sisters, or father, or mother, or wife, or children, or lands, for my
name's sake, shall receive an hundredfold, and shall inherit
Mar 10:29 And Jesus answered and said, Verily I say unto you, There is
no man that hath left house, or brethren, or sisters, or father, or
mother, or wife, or children, or lands, for my sake, and the gospel's,
Mar 10:30 But he shall receive an hundredfold now in this time,
houses, and brethren, and sisters, and mothers, and children, and
lands, with persecutions; and in the world to come eternal life.
Jhn 17:11 And now I am no more in the world, but these are in the
world, and I come to thee. Holy Father, keep through thine own name
those whom thou hast given me, that they may be one, as we [are].