is there any explicit indication that it's even good not to get what we want?
Depends on the "what" of what we want. If one wants to get filthy rich so that s/he can indulge in all sensual pleasures of life, then it's obviously not good. If one wants to perfect their own virtues, attain the peace of meditation, or put an end to suffering, then those are wholesome desires. The important key here is to have wholesome desires, not having no desire whatsoever:
From SN 51.15: "In that case, brahman, let me question you on this matter. Answer as you see fit. What do you think: Didn't you first have desire, thinking, 'I'll go to the park,' and then when you reached the park, wasn't that particular desire allayed?"
"Yes, sir."
"Didn't you first have persistence, thinking, 'I'll go to the park,' and then when you reached the park, wasn't that particular persistence allayed?"
"Yes, sir."
"Didn't you first have the intent, thinking, 'I'll go to the park,' and then when you reached the park, wasn't that particular intent allayed?"
"Yes, sir."
"Didn't you first have [an act of] discrimination, thinking, 'I'll go to the park,' and then when you reached the park, wasn't that particular act of discrimination allayed?"
"Yes, sir."
"So it is with an arahant whose mental effluents are ended, who has reached fulfillment, done the task, laid down the burden, attained the true goal, totally destroyed the fetter of becoming, and who is released through right gnosis. Whatever desire he first had for the attainment of arahantship, on attaining arahantship that particular desire is allayed. Whatever persistence he first had for the attainment of arahantship, on attaining arahantship that particular persistence is allayed. Whatever intent he first had for the attainment of arahantship, on attaining arahantship that particular intent is allayed. Whatever discrimination he first had for the attainment of arahantship, on attaining arahantship that particular discrimination is allayed.