Alloy ain't stopping pressure.
big mech vs 1 automatically targeting banana of doom
And the joints are also alloy.
Also the legs are made of boron nanotube alloy shi, and the tubes are of similiar but more flexible alloy.
Also legs where a first over last thing made
My 2am brain accidently flipped a leg backwards
You should add eiter much larger front facing cannons or a cruise missile system to allow it to fight back against other megaheavy mechs,along with adding heavier legs and a larger engine
im constructing my criticisms
The 4, spindly legs also probably won't support an armored, 500+ ton vehicle. If this is supposed to be based off of an ATAT, get stronger legs. Fit a fully rotating turret onto the bottom, (more traverse, including to the sides, and more gun) and add some autoloaders. Possibly angle the armor outwards more similar to a trapezoid shape. (most stuff is going to be much shorter than you, and so you need to have the angled armor to actually work, instead of just facing them flat on)
The joints could be potentially overpressured or jammed by shells, so you should add some sort of joint shield. (though it might limit flexibility in certain directions) Most of the turrets seems to be flak or AA. It's the early 2000s, buddy. Have some radar and missiles instead. Also, have a few cameras or sights to see better. And also, hydraulics can also be overpressured. The main frontal turret doesn't seem to have much horizontal traverse. The guns could also be longer. (distance+speed)