Maybe....but let's remember what happened at the bitter end when ARVN troops ran like scared rabbits to the helicopters. People can make all sorts of excuses, such as cutbacks in U.S. aid, but ultimately that can not explain away a lack of fighting grit.
Equally revealing of a lack of fighting grit was the failure ex-ARVN, or anyone else in SV, to launch an insurgency against the new communist regime. Please note the contrast between this failure and, for example, the Afghans who initially launched an insurgency with surplus British weapons from the turn of the twentieth century or the Filippinos who launched an insurgency against the U.S. in 1898 despite a near complete lack of weapons.
Strawman, we fought along side the ARVN Rangers during Tet, they were good only problem they talked to much.
The average ARVN ran because he had been abandoned. South Vietnam was publicly been written off by the USA, and faced the North, China and the Soviet Union all at once. ARVN officers did retreat to Cambodia or even Thailand, but with the Khmer Rouge coming to power, who was going to help them?
Remember that the NVA ran too when things go too hot for them.