Is this really an achievement when someone else could do it in 1965? Is it an achievement when other countries can land rovers on mars? India should be a leader, not follow others' footsteps.
EDIT: 1971, not 1965
EDIT: 1971, not 1965
Also, by the way, the first Mars orbiter wasn't in 1965—that was the first successful flyby. The first successful orbiter was Mariner 9 (https://en.wikipedia.org/wiki/Mariner_9) in 1971.
The thing about spacecraft is that there is a huge engineering component. The s/c is in a novel environment (vacuum, radiation, cold) and many systems have to work together. You have to figure it all out in advance, using first-principles physics and modeling, and design and build a system that works without further manual intervention. Just getting it there intact is a significant achievement in systems engineering.
Technology demonstration is what this mission was about.