M103 is a sleeper

I mean, what’s bad about it? It’s gto a t10s gun, 384mm heat pen with calibrated, 32 average speed, good turret and upper hull armor, and leads to one fo the best tier tens in the game. Why is there so much of a lack of info on this tank in reddit? And why does everyone think its bad when I find it carries in 8,9 games and is still good in tier tens?