The bench going down doesn't have to do with rest-pause, in fact this is a good way to increase it.
Or, find something else that appeals more-even if it's good if you don't like it it's unlikely to work.
Hey Figgs,
Pumpster is right that rest-pause training can help your bench. I think you did too many reps though.
Here's how I read that it should be used.
Pick a weight that you can get for 3 or 4 good reps, but no more. Say you can do 315lbs for 3, but always need help from a spotter to get the 4th. Well next time doing chest, put on 315lbs, do your 3 reps, and wait 12 to 15 secs. Do another rep, just one. Then wait another 15 secs or so, and do one more. Then that set is done.
While it's not the same as 5 continous reps of 315lbs, you still moved it for 5 reps, instead of 3 and a half, or however much the spotter would help on the fourth. Do this for a couple of workouts, and then go back to normal, and you should be getting 315lbs for 4 to 5 on a normal set.
Good Luck!