Manager said "You are not a problem" when I asked if I was moved due to poor performance. What does this mean?

Thankfully I've only had to do a couple months warehouse work during a stint of unemployment (well, guess I was employed there but a stint out of my industry). But I soon learnt that in a warehouse it is very important to do the bare minimum. I initially approached handballing stock out of lorries as quite a good physical challenge, got into a nice flow state and rhythm loading boxes onto pallets then taking them away. I soon made enemies and was annoying people until someone explained to me that we clock in at 7 and leave at 3 regardless of how much work there is left. Half unloaded lorry in a bay? Either late shift pick it up or the driver spends the night and we finish tomorrow morning. Never rush a load through because if you get everything done you'll be forced to sweep the warehouse the rest of the day, maybe even the following day if no new arrivals come in. Take a smoke/vape break every 15 mins or so. As someone with a work ethic i ironically couldn't 'keep up' with the laziness/slowness of it.