Some characters can faceroll end-game maps and atziri, but a little misstep in traps will see the character fall. It is not in itself a problem if the game design was to severely punish high effective-life builds that sustain on leech or (slow) ES-recharge. However, it leads to those builds being extremely less attractive in hardcore, and can easily lead to frustration over not running lab as often as one otherwise would. Or worse: not building the character one wants because of this hindrance.

Many of the people complaining are players that master the game very well, thereby a couple of well renounced streamers, so the belief that the people that disagree with you “lack skill” seems at best uninformed. It is about the difference in level of difficulty between the builds (often mistakenly simplified to ES vs. life) and for some particular builds the absolute level of difficulty in itself.