If your opponent has a card like Ashnods Altar or High Market on the board, they can just sacrifice the bug to get their commander back into the Command Zone, making your play a waste of mana
It also burns for a good reason, making players think about playing a land or taking damage, potentially leaving them behind on mana
Indoraptor, the Perfect Hybrid Indoraptor, the Perfect Hybrid is a charcuterie board of aggressive mechanics: a dash of menace to push through in combat and force double-blocks, bloodthirst to come in as the largest threat on the table, and enrage to gobble up opposing creatures and punish said double-blocks
Dionus, Elvish Archdruid gives them a significant buff with its counters, which stick around if your opponents answer Dionus, and you get a huge mana boost off untapping Elvish Archdruid and similar cards