Yes, I would cut the ones that show a lot of damage. It looks like what happens when the plants get exposed to cold weather in the Fall. Of course, a late frost/freeze would now be the culprit. The injury can happen anywhere on the leaves but I usually see it start somewhere between the middle to the bottom of the affected leaf. If that is the problem, removing affected leaves would eventually force the plant to produce new leaves that would n-o-t have this issue. So, monitor the replacement leaves and make sure that those replacement leaves have no problems. If the replacement leaves have issues then there is another problem.
There are other fungal issues that can produce issues -such as anthracnose- but, unless this problem started at the nursery, it would be difficult to think you did something that helped create fungal issues this advanced after planting just 7 days ago. Here is a link that you can review: http://www.aces.edu/pubs/docs/A/ANR-1212/ANR-1212.pdf
To help minimize fungal issues, water early in the mornings, never water the leaves (water the soil instead) and throw into the trash (not into the compost pile) all plant debris and all the leaves that you cut. To help minimize root rot issues, water only when the soil feels almost dry or dry.
Signs of too much water: some leaves can start to turn all yellow -including the veins- for lack of oxygen and as the problem progresses and root rot takes hold, wilting becomes a 24/7 problem no matter how much water you give the plant.
Signs of not enough water, wilting episodes amd leaves that brown out starting on the edges inwards.
Take new picture(s) of how the plant looks like after you have cut affected leaves so it helps you remember what did it look like. And if new issues appear, it would be a good before-after picture.