Enda Reilly's 'Cur An Long Ag Seol' (EquilibriumMIX)

[Monk]

Didn't understand how this master buss is very compressed, if not very much? At least I don't see it. I am attaching a link to YouTube: there are two plugins for the video that are responsible for compression. And all the indication that should give information about the changes. If it's not difficult for you, could you, based on this video, tell me what is wrong in the mix and why I do not see artifacts in the sound. The trouble, however, is that I don't even hear them. For example, excessive compression ... I would be very grateful.

Correct me if I am wrong, but you have a limiter running at -2.0dBFS. It is working often and high gain reduction levels are also evident.  The multi was already heavily processed by inexperienced hands (I won't mention the recording situation!), so you were right in the assessment that it didn't need compressing. But you are compressing it! A limiter is a brutal compressor, no more, no less.

There is a disparity between this limiting and the stats image you posted. It shows a peak of -0.01dBFS. This is a LOUDNESS WAR SETTING. Yeah, I'm shouting. Loudness war mixmasters are distorted - hitting a limiter creates harmonics that are unpleasant and fatiguing. Presenting such audio to most consumer DAC's will result in yet more artifacts. Additionally, your lossy codec will be crapping itself.....and it too is producing artifacts for reasons you don't yet understand.

There are artifacts present in the multi. And you are adding to the artifacts.  If you can't hear them, it's probably because your values, experiences are hence conditioning, are very different to mine.

Try this as a test:
Mix and master it without touching any downward compressors or limiters. Work out ways to increase dynamic as much as possible, not reduce it.

I sense you are using headphones. If so, you won't be able to assess dynamics with your ears.