Your honest and broken words have been heard, and the sorrow in them is not hidden from the Lord. To be under the power of harsh words from a parent, to have been kept as a servant until death parted you, to have had that parent take the side of those who abused you, and now to be left alone as an only child with relatives turned away, is a heavy and bitter affliction. That you feel you cannot hold up, that you feel abandoned and without protection or love, and that you carry dread and doubt from long mistreatment, is understood. The wounds of verbal abuse do set a course in the heart, and it is no small thing to bear them.
Yet the power of a parent's words, though cruel and lasting, is not greater than the power of God's Word. Man may speak words that wound and misdirect, but God speaks words that heal and restore. Where God begins a work, He does not ask you to finish it. He completes His own work. If you pray in the name of Jesus not to get things but because you love God and love Jesus, that very love is a sign that His Spirit is already at work in you. Do not turn that into a reason for doubt. It is true humility to take God at His Word and to believe Him when He says He will save those who trust in Christ.
You write that you feel abandoned by Him, especially when people are cruel, and that you are scared to trust Him. Our Lord Jesus Christ knows that very feeling. On the cross He cried, My God, my God, why have You forsaken Me. Nothing remained within, without, or above when His own God turned from Him, and He bore that forsakenness for His people. He is not distant from your anguish. He has entered into the region of feeling forsaken so that you might never truly be forsaken. The godly in their anguish turn to the hand that smites them, and the Savior's cry was not against God but to God. If you think God has left you, do not give up prayer. No, pray as your Lord did and be more earnest than ever. Cry My God, my God, again and again, for He hears you. As the psalmist said, I have declared my ways and You heard me. Teach me Your statutes. You may declare your ways to Him now, in plain words, and know that He hears.
He is the God of the hills and the God of the valleys. He is not only the God of the strong and the joyful, but the God of the afflicted and the lonely. Though clouds may surround you and storms rage around you, He is your light and your might. There is no true understanding of His truth except by personal experience of it, and He pleads the cause of His people. It is written, It is God that justifies, who is he that condemns. It is Christ that died, yea rather, that is risen again, who is even at the right hand of God, who also makes intercession for us. Your cause is in His hands when you have no strength to plead it yourself.
You wonder whether you should just let people take advantage of you because you have no strength to keep going back and forth. To let cruelty continue is not what the Lord requires of you. To love others does not mean to give others leave to do you harm. You may set quiet and firm boundaries, and you may seek help to do so. That you have been mistreated in the church by gossip and backbiting is a real grief, and such things wound deeply. Yet do not measure God by the failure of some of His professing people. God resides among His true Church, and He Himself is faithful when men are not. Ask the Lord to show you one or two sober, faithful believers or a pastor who will walk with you steadily, hear you without gossip, and point you to Christ.
You say you feel lost and do not really know God and are scared to trust Him. Take Him at His Word. If He says He will save you if you trust Him, then if you trust Him, He will save you. Those who have trusted in God find Him to be as real as if they could see Him. You need not have perfect faith, only true faith in a perfect Savior. Look to the Son of God pouring out His life for sinners and trust Him, for then sins are gone in a moment, and peace begins. You are not saved by keeping the law without fault, for none can, but by the blood of Jesus Christ alone. Salvation is by grace through faith, and that not of yourselves, it is the gift of God.
May the Lord give you grace to trust Him today, to keep declaring your ways to Him, and to rest in this, that He who began a good work in you will perform it until the day of Jesus Christ. You are not forgotten. You are seen. May He be your God, your portion, and your home, and may He bring to you present peace and the hope of future perfection with Him.
We are praying for you, that the Lord will guard you, provide for you, heal what has been so long wounded, and teach you more and more to know Him as your God and Father through Jesus Christ our Lord.