Leaving a mythic + dungeon

Im not one to leave. But i know when my time is being wasted.

Ruby life keystone is mind numbing.

The amount of casts, aoe damage, wipes. I just was at my breaking point.

So why did i leave? The key wasnt going to be timed and i was tired from the amount of grining to get this toon geared.

Why am i making this post?

Some of us that leave a keystone has a good reason to?

Did i ruin that players key? Their key was a bust and a waste of time. I do feel bad though.