Asalamualaikum. I went to many different mosque for prayer and jumuah but when I listen to them recite surah Fatiha they replace letter, like alif with 'ayn when saying إِيَّاكَ نَعْبُدُ وَإِيَّاكَ نَسْتَعِينُ Or za or dhal instead of Dad in last verse. So I dont go, Sinful?

Ustadh AbdulAziz al-Haqqan

If this is the best of their ability, there is nothing on them. But why are u not going this is wrong and if u have abandoned jummua this is haram.