Battle with iPhone 7's bulk

Has my technique deteriorated?、Or maybe it's because of the sluggishness of the iPhone 7 I'm using...

Typing errors occur frequently。

Why?

I don't think it's possible for me to suddenly become bad at typing.、There are many mistakes。I think one of the reasons is that it moves slowly.。

I'll try to type more calmly.。If it doesn't improve much, I'll give up and get a new one.。
Or maybe replacing the battery will make things better? ?

That said,、The shops aren't even open...