If someone suggest me another tactics and formation , I will consider that too.. This formation has troubled me a lot..
another option if 4-5-1 V didn't work at 1st half, if you see one of their DC rating reduce below 6.5, change your winger become 3-ST and focus through the middle. forget to beat their fullback, just focus to beat their 2-DC
at 2nd half, try out attacking mentality, mixed pass through the middle
make sure to put your DMC same position with opponent AMC,
if you do your reading here you'll find that list of counter-formations... and also veteran managers saying it's not fool-proof, not so important any more, even opinions that formation matters very little. do your own tests in friendly games with similar Q ratio.
I'm using your opponent's formation, a lot. but im low level and rarely have tough enough opponents to really learn anything. so far, no 4-5-1 worked against my teams. what did i had trouble with is 4-4-2 with wingers slightly forward, 4-4-2 ND and 4-1-4-1