@Pearl12 Comparing it to the monkeylord is a bit unfair since that's the ultimate rush experimental and it only manages those memorable base wipes when it's brought to bear early enough to encounter little resistance. But the balance team was afforded a luxury when making it so: cybran have 2 land experimentals so they could specialize one of them for early-late-game. Fatties, on the other hand, we should instead compare to chickens, GCs and megaliths.
All that being said, you are still right, I think. The fatty is more dependent on supporting units than all of those, since it can't tank and its damage is so low. This, I think, was also a deliberate design choice by the balance team, justified at the time by the fact that UEF had what was perceived to be a stronger-than-average t3 land unit mix, some even said the strongest, before snipers became so popular.
I think that by trying to make it's extreme range the defining characteristic though, the balance team sort of painted themselves into a corner. With this constraint, they had to reduce its speed, damage and health compared to other experimentals, otherwise it could just kite them too effectively. This, in turn, made it disproportionately vulnerable to air snipes and t2 artillery, as people have mentioned. To be clear, I don't think it's a bad design direction to explore, but maybe toning down it's range, projectile speed or shot spread a bit might allow some buffs to it's weaknesses, health and damage. As long as other experimentals, while dodging, can still take it down 1v1, that might be ok.