All those things can only be done with simulations because the way that we use computers has caused us to build features like malleability, predictability etc into them.

The fact that we can easily time reverse some simulations means little: You haven't shown that having the capability to time reverse something detracts from other properties that it might have. It would be easy to make simulations based on analogue computers where we could never get the same simulation twice, but there wouldn't be much of a market for those computers - and, importantly, it wouldn't persuade you any more.

It is irrelevant that you can slow down a simulation. You have to alter the physical system running the simulation to make it run slower: You are changing it into a different system that runs slower. We could make you run slower too if we were allowed to change your physical system. Also, once more - you are just claiming that that even matters - that the capability to do something to a system detracts from other features.

The lookup table argument is irrelevant. If a program is not running a lookup table, and you convert it to one, you have changed the physical configuration of that system. We could convert you into a giant lookup table just as easily if we are allowed to alter you as well.

The "unplug" one is particularly weak. We can unplug you with a gun. We can unplug you by shutting off the oxygen supply to your brain. Again, where is a proof that being able to unplug something makes it not real?

All I see here is a lot of claims that being able to do something with a certain type of system - which has been deliberately set up to make it easy to do things with it - makes it not real. I see no argument to justify any of that. Further, the actual claims are dubious.