This is waswas from Satan, you have to ignore it and continue your Ibadah. You are being rewarded twice for the difficulty and for the Ibadah itself.
Do your best and Allah will be pleased with you.

Im being taught tajwid but awful at Arabic. My Fatiha has~20 mistakes.Same when saying proscribed dua.Make me upset&want to give up sunnahprayers/learning new surahs/saying duas as I know Im saying them wrong&I fear punishment for rewording the Quran&duas through my misspeech&fear not getting the reward as I say it wrong.Can I do these acts of ibadah though Im mispronouncing but not deliberately?

Reading/Reciting the Quran | October 27, 2015 3:11 am
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Dear Shiek, actually i feel that Allah swt has blessed with good voice while reading quran. Sometimes during Tahajjud or leading salah i like to hear my own voice since im happy with it, but i dont expect people to praise me for it. In this case will it be considered as sin (Shirk).
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Is it necessary to recite quran in arabic? because i dont understand arabic so can i read it in my language?