Of course believers will go through trials and tribulations and that because Jesus said we would. The problem is that people are not discerning between those common trials and tribulation which come at the hands of mankind and the powers of darkness vs. the tribulations caused by God's wrath which will be carried out via the seals, trumpets and bowl judgments. The wrath of God is what the majority of Revelation is about.
Believers have been experiencing trials and tribulations since the on-set of the church. However, it is not the same as God's coming wrath upon this earth. This will be an unprecedented time where God will deliberately be pouring out His wrath upon a Christ rejecting world. That said, We who have believed in Christ, have been credited with the righteousness of Christ and have been reconciled to God through faith in His shed blood. Therefore, believers cannot and will not go through the time of God's wrath. The scriptures also support this:
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Therefore, since we have now been justified by His blood, how much more shall we be saved from wrath through Him! - Rom.5:9
They tell how you turned to God from idols to serve the living and true God, and to wait for his Son from heaven, whom he raised from the dead—Jesus, who rescues us from the coming wrath. - 1 Thessalonians 1:10
But since we belong to the day, let us be sober, putting on faith and love as a breastplate, and the hope of salvation as a helmet. For God did not appoint us to suffer wrath but to receive salvation through our Lord Jesus Christ. - 1 Thessalonians 5:9
Because you have kept the word of My patient endurance, I also will keep you out of the hour of the trial being about to come upon the whole inhabited world, to try those dwelling upon the earth. - Revelation 3:10
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Now, the popular opologetic, is to attempt to distort scripture by claiming that the wrath that is being spoken of is referring to the great white throne judgment. However, believers in Christ are not appointed to suffer ANY wrath and that because Jesus already suffered it on every believers behalf. Therefore, God's wrath will not be poured out upon the believer since it has already been satisfied by Christ.
Regarding this, in Revelation 3:10 in the letter to the church of Philadelphia and to all believers who overcome, Jesus says that He will "keep us out of" that hour of trial that going to come upon the whole inhabited world, which means that believers will not even be exposed to that time of wrath, i.e. the Lord will appear and remove His church prior to said wrath.