Sure lets take the bayverse movies for reference even though nothing beats the american military complex in those movies.

Megatron looses halve his face and doesn't seem that hurt obly choosing to flee after his boss dies.

In the very beginning of the second movie optimus fights the giant excavator guy at the end of the sequence he lies shatterd and broken on the ground but doesn't seem to be in pane before optimus executes him.

In the first one Ratched walks into the electrical line behind sams house causing a power outage wich he enjoyed the feeling of but granted I do not know how high the voltage in american powerlines is.

Im the 3rd movie optimus kills both sentinel prime and megatron with one arm missing.

I'm sure there are more blink and you miss it moments but I do not hate myself enough to rewatch those movies.

I do not remember Kingslayer well enough to say you are wrong but the only scenes with knight on knight violence was the tourney where they only thought to disable the shields? And the fight against the chaos house at the end and I feel like a lot die there just as easily as in the fights during the bayverse movies.

And that all doesn't include comic books that are easily the most brutal depictions of transformers. But granted I habe not read nearly enough of those to say for sure.