IS EA GONNA DO ANYTHING ABOUT CHEATERS IN THE GAME?

Is he in your same payout hour?  You may want to contact him in game by looking up his ID on swgoh.gg website.  Most old fleet and arena shards don't have much true competition, the players have worked out pay schedules throughout the day or rotate number 1 weekly if more than one share it.  Battling all day long is not time effective.  Veterans typically only battle the hour before their payout.  Discord is a great place to host a shard chat and work things out. Spending 50 crystals to refresh when you earn that same amount if not spending is a waste of time.  The prestige of having #1 in fleet or arena is not as value reward-wise in game as it was years ago. If I were you I would reach out, he may not know he is being disruptive and thinks being number 1 is significant when it only is for a few minutes a day.