It's just my own opinion on what I find fun, there's no need to be rude.
Alright, I was drinking and may have come off like an ass; let's not fight.
I do, however think you're exaggerating. In the IE games fighters are basically binary: you either auto-attack with them or you don't auto-attack with them. Sure, you can also use inventory items to give them a bit more versatility, and eventually HLA come into play as well, but inventory items are present in PoE as well, and HLAs are, as the name suggests, designed for high-levels.
PoE by contrast actually has multiple different ways to build fighters. It has modal and active abilities that can significantly change the fighter's role in your party composition. You may find PoE overall a less interesting game than the IE games (I do), but saying the Fighter in particular is a more boring class to play strikes me as disingenuous.