Downvotes are a necessary part of Hive. Live with that and the fact that rewards are not settled until payout.
You are investing time and getting paid. Absolutes like
No one can find any stability or trust here
are blatantly untrue. A small minority get downvotes and pissing off those who care about Hive does you no favours.
As for 'take them to court'. No need, we just remove the plagiarists' ill-gotten rewards. Can you imagine what it would cost to track them down and pay legal costs?
Enjoy your rewards.