Easy. Like the other Pharisees whom Jesus condemned so often, Paul invented many rules which have no basis in Scripture, and in some cases can be very detrimental:
"I say this as a concession, not as a commandment... (married people should not withhold themselves from sexual relations)" (1 Cor 7:6) (thus obligating less fortunate women to unnatural, painful, or even dangerous sex by their husbands);
Sorry irrelevant! Paul clearly says this is not a commandment. Paul giving his opinion is not an unscriptural Pharisaical doctrine! Is this what we can expect from you, twisting scripture to support vehement anti-Paul presuppositions? I do not have a virulent hatred for Paul so I assume that anything he says is tempered by common sense and good judgement. Such as suggesting married couples can decline marital relations when appropriate, in vs. 5, which you conveniently omitted.
1Co 7:5-6
(5) Defraud ye not one the other, except it be with consent for a time, that ye may give yourselves to fasting and prayer; and come together again, that Satan tempt you not for your incontinency.
(6) But I speak this by permission, and not of commandment.
"I say to the unmarried and to the widows... (it is better to remain single)" (1 Cor 7:8) (thus condemning them to loneliness);
Saying something is better does not constitute an unscriptural Pharisaical command! And you ignore that elsewhere Paul said it was permissible to marry see 1 Cor 7:9. So still twisting scripture.
"I, not the Lord, say... (children are sanctified by a believing parent)" (1 Cor 7:12) (thus providing a handy excuse for sinful children to remain in sin);
More twisting of scripture. 1 Cor 78:12 says nothing about children. Have you ever read Eph 6:1 "
Children, obey your parents in the Lord: for this is right?"
"I ordain... (do not become slaves of men)" (1 Cor 7:17) (ignoring the problem that for some, this might be the only source of employment);
More deliberate twisting of scripture, 1 Cor 7:17 says nothing about slaves. "
as God hath distributed to every man" is absolutely not an unscriptural Pharisaical command.
1Co 7:17 But as God hath distributed to every man, as the Lord hath called every one, so let him walk. And so ordain I in all churches. .
"I have no commandment from the Lord, yet I give judgment... (it is better not to get married)" (1 Cor 7:25) (what happened to the commandment to 'fill the earth and populate it?);
"according to my judgment... (widows should not remarry)" (1 Cor 7:40) (thus condemning them to loneliness and poverty);
More twisting of scripture. Paul giving his opinion is a far cry from giving an unscriptural Pharisaical commandment.
"Every man praying or prophesying, having his head covered, dishonors his head" (1 Cor 11:4) (huh?);
According to the Talmud this was the common practice of the Jews.
"Every woman who prays or prophesies with her head uncovered dishonors her head" (1 Cor 11:13) (huh?);
It was common practice of the Jews that women be covered in worship.
"Long hair dishonours a man" (1 Cor 11:14) (this contradicts the law of the nazirite);
Once again I don't have a virulent hatred of Paul and I assume that he has common sense.
John Gill's commentary 1Co 11:14 -
The fact that nature has provided woman, and not man, with long hair, proves that man was designed to be uncovered, and woman covered. The Nazarite, however, wore long hair lawfully, as being part of a vow sanctioned by God (Num_6:5). Compare as to Absalom, 2Sa_14:26, and Act_18:18.
"Women are not permitted to speak in church... if they want to learn something, let them ask their own husbands at home" (1 Cor 14:34-35) (but women were prominent not only in Jesus's ministry, but in the history of Israel back to Judges and earlier).
More twisting scripture. You omitted the rest of the verse, "
they are commanded to be under obedience, as also saith the law." The law Paul referrred to was Gen 3:16. Obedience to the law is not an unscriptural Pharisaical commandment. According to the Talmud,
"a woman may not read (that is, in the law), בצבור, "in the congregation", or church, because of the honour of the congregation;''
These oral law additions are far from trivial, because entire denominations have been built upon them.
As I have demonstated you have NOT shown any unscriptural Pharisaical traditions, only twirsted scripture.
Yeshua had warned that "he who speaks from himself seeks his own glory" (John 7:18), but obviously this meant nothing to the Pharisee Paul.
Out-of-context proof text. Jesus was talking about Himself. He did not say or imply that a person could not express an opinion.
Joh 7:17-18
(17) If any man will do his will, he shall know of the doctrine, whether it be of God, or whether I speak of myself.
(18) He that speaketh of himself seeketh his own glory: but he that seeketh his glory that sent him, the same is true, and no unrighteousness is in him.
As you can see I have refuted all your out-of-context proof texts. I repeat my question, can you show me any scripture where Paul routinely associated with Pharisees, espoused Pharisaical doctrine or condemned people for not following Pharisaical doctrine?