No, it's not. Sorry, but Paul's writing clearly establish the existence of the local church. In I Corinthians 11:20, believers are admonished for "meeting together" (Greek sunerchomai) with divisions among them. Paul does not admonish them for having a meeting place or an attitude of community, which is what a church is. He admonishes them for failing to live up to the purpose of the church, the word ekkesia which he uses in v. 18 just before this admonition. In 1 Thessalonians 1:1, he again uses ekkesia and does he admonish the elievers for being a community? No, he offers them grace and peace as a local church. His pastoral letters reinforced his instruction to Timothy as the pastor of a local church, not an itinerate preacher living and working in the streets.Really? Then why did He use the same word ekklesia three times in Matthew?
"I also say to you that you are Peter, and upon this rock I will build My church; and the gates of Hades will not overpower it. (Matthew 16:18)
"If he refuses to listen to them, tell it to the church to ; and if he refuses to listen even to the church , let him be to you as a Gentile and a taxcollector. (Matthew 18:17)
If Jesus didn't establish the local church (and you cannot differentiate between the "local" church and the doctrine to which it adheres) He would not have used the word ekklesia in both these passages. Jesus called His followers to draw together in local assemblies for worship, for instruction and for accountability. To leave it to the body as a whole would have been ludicrous, as any of those things without assembly is impossible.That may be true of some factions of the universal church, but to abandon the concept based on the erroneous focus of some is cutting your nose off to spite your face.That's balogne. Obviously in the first Matthew passage above, He clearly stated that "His church" would be built, not on Peter, but on the kind of faith Peter expressed two verses earlier. Jesus clearly established "the church" as He promised. In the rest of the New Testament, ekkesia designates the community of Christian disciples who gathered at least weekly for common liturgy and prayer. "Church" is used 62 times in the letters attributed to Paul, most often to denote the local Christian community or clusters of them (Rom 16:4; 1 Cor 1:2, 14:33; 2 Cor 8:18; Gal 1:2; 1 Thess 1:1), or occasionally to refer to the whole church (Gal 1:13; 1 Cor 12:28) in a universal, cosmic sense (Col 1:24; Eph 5:29).Of Paul's 13 letters (I do not count Hebrews) 10 of them were addressed to local churches. If they didn't "establish them," Paul wouldn't have been writing to them, other than to instruct them to disband as being contrary to the Lord's will.
What you have a problem with is not "church" but denominationalism, and I agree there are denominations that twist, warp and pervert the will of the Lord for His body. But that is true of individuals as well as denominations, and we don't cast out misguided members of the body simply for being misguided.