Hahaha.
Jokes aside, I never lost to a 4-5-1(V) and 'never' lost to a 4-3N-3 (though I did lose one in testing accounts, but that does not count), even against stronger ones, but this is not really by chance. I even defeated a strong and very active 4-5-1(V) (not passive, that is not the one that would sit back and wait for counter-attacking opportunities, but attacking and pressing like Barcelona) 4-3 way back during the early weeks of the associations. For me, when I see an opponent with 4-5-1(V) or 4-3-3, it is like the win is almost in the bag. Sure, there are still some doubts at times, but those two formations are among the ones I mastered on how to beat them.
Nik (4-5-1(V)) and khris (4-3-3) never faced me, and khris (4-2-3W-1) never faced me. But if ever I had to face those 3, I would be more worry about the 4-2-3W-1 than the other two. I learned a bit how to deal with the 4-2-3W-1 too but lack practice against it. But, nowadays, in this game, it seems that formations do not matter much like before, and even quality on its own, unless you have large quality differences. Many formations can beat many other formations by other means other than the base positioning of players according to the formation used itself.
I would like to mention something though. It was Nik that showed me how to play with 4-5-1(V) in this game (I mean the defensive and counter-attacking style) when I was in L2. At that time, I did not have much knowledge of the game, and that little bit that Nik showed me did help me to win some things.