[Discussion] Is Pioneer really a bad format?

I would like to hear what you guys think about Pioneer as a format. Explorer (which is I think like 90% of what Pioneer is) is my favourite Arena format and I wanted to approach tabletop Pioneer, but basically no LGS near me plays it.

I've read a lot of different opinions online but it seems that the majority of the player base dislikes Pioneer and I really can't understand why. This is also showed by the format play rates stats on Arena, where Explorer is the least played constructed format.

From what I can see, Explorer/Pioneer is the last home of "fair magic". The format seems pretty diverse and balanced to me, with no tier 0 decks and a rock paper scissors metagame that's healthy at least in theory. Every macro-archetype (aggro, midrange, control, Combo) is well represented, so one can play the style of decks they prefer and hope to be competitive.

So what am I missing here? Am I drawing the wrong conclusions or is there something else I can't see that makes this format actually bad and unfun to play?

Thanks to anyone who'll lose a bit of their time to leave an answer.