Excel VBA deleting rows in a for loop misses rows

Since there's no Reverse loop for For Each you need to use a slightly different approach.

Also, your code with multiple Ifs and OR is "screaming for the use of Select Case.

Dim StatusRange As Range
Dim i As Long

Set StatusRange = Range("B2", Range("B2").End(xlDown))

' loop backward when deleting Ranges, Rows, Cells
For i = StatusRange.Rows.Count To 1 Step -1
    Select Case StatusRange(i, 1).Value
        Case "FG", "QC", "CS"
            StatusRange(i, 1).EntireRow.Delete
        Case Else ' for the future if you need it

    End Select
Next i

Work from the bottom up. If you delete a row, everything moves up and you skip that row on the next iteration.

Here is the 'guts' of the code to work up from the bottom.

With Worksheets("Sheet1")
    For rw = .Cells(.Rows.Count, "B").End(xlUp).Row To 2 Step -1
        Select Case UCase(.Cells(rw, "B").Value2)
            Case "FG", "QC", "CS"
                .Rows(rw).EntireRow.Delete
        End Select
    Next rw
End With