What a waste of effort.
Saying that relies on a basic misunderstanding of science and the process of a whole. Thinking that way is completely worthless for science in general, such an incredibly toxic way of thinking that it would be better not talking about science at all.
I'm not saying that's what you should do, only that you should stop thinking that way.
Negative results are exactly as important as positive ones. A negative result still brings forward understanding. Now we know
quite specifically that the 750 GeV digamma excess is
not the cause of a new particle--in fact, if I'm reading that right, it looks like it's a new interaction result for a very high energy proton pair interaction, which is also interesting.
As another example of a negative result being important: the
Michelson-Morley experiment, to test what the speed of the Earth is relative to the luminiferous aether. We found the answer to be... not. The fact that this experiment was a
catastrophic failure showed us that we had something wrong with our model and eventually helped bring along relativity.
On the other hand, the negative result at the LHC more shows us that our model is
right, which is also a good result.
You may notice that anything that gets more data is a good result pretty much always. Even just redoing already-done experiments and getting the same result is important (in fact, it's one of
the most important things in science--if an experiment isn't replicable, it's a worthless experiment, and the only way to test replicability is to replicate).