Exchange volume on btc is definitely botty but this doesn't means the same isn't the case in real Market scenarios. I mean that no digital exchanges working on buying matching concept can work without bots. But yes in small exchanges even in the DEX we have a lot of bots doing majority of trading. These bots create buy sell walls by filling the order book but I don't think this is any sign of alarm it's normal and these exchanges are useless for trading.