the match started officially at 1700 and the actual game started at 1714, your bet was 5 minutes and 14 seconds after that.
I dont see the issue here, I know it really sucks esports are very difficult and if you dont have something that says any different what do you expect fairlay to use?
there are hundreds even thousands of match start times and you cannot watch videos to see when they fired the first bullet of each one you have to use the site official start time and if there is an issue with the ruling fairlay is glad to review it and modify it if its incorrect.
sorry about that it really sucks but fairlay is very well known as trustworthy and any issues they try to resolve using Pinnacles rules where they are applicable
https://www.pinnacle.com/en/help/betting-rules#Esports