Because all the matches happened to be on the same date, I do not see this as a Clan War win farming. There are clans that do matches after matches for a day to see if they could beat the other clan. I would consider this farming if several date stamps of that magnitude were recorded. If you could collect another date of them doing this, then that could be reported along with the screenshots above via Contact Us
for clan wins-farming. You will need more supportive evidence as just mentioned.