Arguably Hayate would be best compared to one of those huge-ass big-gun battleships of yore; tremendously powerful, but in dire need of escort flotillas so it doesn’t get CAVED by swarms of fast little ships (which its powerful main batteries have serious problems tracking) with torpedoes and/or flights of strike aircraft. Or simply a task force of a few lesser capital ships – your average battleship was in serious trouble indeed if it had to face even about three or so heavy cruisers at once.

Another workable parallel would be an MBT – powerful and armoured as those are, they require quite a bit of support from other forces (infantry in “close” terrain, AA cover, recon elements etc.) if they are to be much good in the field.

…or one of those tactical artillery missile vehicles. Can wipe out a city (if you put a tacnuke in the missile), but die like flies if even scout vehicles can get close…