4-5-1 V is one of the most successful formations of the game.
I doubt if this is the cause of your under-performing.
It depends also from other thing like the orders for example
Ok, it's not the place to analyze it as it needs a lot of posts.
So, you must start a new thread showing
- Your bad results
- The teams
- the stats of the game
- your orders
- if opponent was present

and the skills and stats of your two wingers as they are the key players of this formation.
* post that link here