Having an infantry squad or light vehicle melted in seconds before you can even react by a newly built Bofors that hasn't been revealed is 100% not an L2P issue. Or I guess people just need to learn to retreat the very instant anything encounters a Bofors.
1) It is "seconds" but its not 3-5, takes longer then that, if you are capable of retreating from unlucky run-in against shocks or thompson rangers, you are perfectly capable of running away from bofors, so this is awareness and reaction time thing.
2) Literally ALL vehicles that arrive at the time bofors does can spot it BEFORE it can spot them.