As opposed to which other balanced light vehicle which isnt shut down by an AT gun?
Anyway, it can usually force squads them off in a timely enough manner if theyre forced to cap.
Flak HT, Luchs, T-70, Puma, FHT, AEC - they all afraid AT guns, but at LV-period of a game, there is usually only 1 ATG present, so if u stumble upon ATG u can try to make advantage elsewhere. Flak HT, Luchs, T-70 can avoid ATG and wreck infantry on other flanks. Puma and AEC are anti-vehicle purposed. Puma has large sight and range, AEC has smoke. Plus as i recall puma and AEC are faster than stuart, which allows them to dive.
Flame HT can melt ATG crews, and it doesn't need to stay in place.
But with stuart - there is little u can do if enemy covers LVs - u cannot wipe ATG squad fast. It is possible yes, but it takes time, which often u don't have. U also cannot increase pressure on other flanks - stuart is unreliable vs infantry - misses a lot.
Maybe increasing it's MG potency will help somehow?