There's lag in every single online game, don't tell me there isn't one that doesn't because if you say there is, you're dreaming. Again this isn't JUST ffxiv. People are just fustrated from this fight and it can be understandable to an extent, however it is beatable by people who have lag or similar issues. Unless your lag is so bad that you can see people warping or something similar from your screen, you should be able to beat titan ex.

It is understandable if you don't find it fun or think it's a "cheap" difficulty or whatever. But understand blaming lag even if it were true doesn't change anything and certainly saying how this is an ffxiv problem only is baloney.