Worst ratings ever?

[Cloverfield]

I did something completely wrong?

Low ratings indeed.
I would recommend not to use 451v against formations that attack solely through the middle.

Prefer to boost your middle part of your tactics.

Go for something like 3dc-1-3mc-2w-1.

It works better.

As talisman said 4 defenders even with 1 dmc seem not to work fine with narrow-middle formations.

Try the suggestions and check if it works better.

For me it really does the difference (and I am a fan of 451v as well )

I counter above formation with 3dc-1-2mc-3w-1 to take advantage the lack of oppo's dm