You cannot “deal” with the Kurds. Turkey has been trying for decades with the best military equipment they can buy.
The best way to deal with militants is to remove the incentive for someone to become a militant in the first place.
Places like Baluchistan, Kurdistan, Ahvaz are very poor and haven’t been economically developed going back to even the Shah era. People living in poverty and squalor are more likely to be radicalized or to pick up arms.
The best way to kill off the movement of militants is to lift people out of poverty alongside every targeted military action.
If Israel cannot eliminate Hamas miltants out of a postage stamp size piece of land, then Iran cannot eliminate Kurdistan terrorists out of the mountainous terrain either. You will be playing wack a mole for decades and end up right where you started.
The situation with Kurds is entirely different from the Baluch people in Iran.
Ahvaz doesn't really have well-organized armed separatists yet. There are small groups, mainly supported by Arabs of the Persian Gulf and Israelis, but they aren't organized yet, and they haven't caused any issues yet.
The Baluch separatism is slightly more advanced than Arab separatism in Iran, but like Arabs, they aren't that dangerous. Sure, they are violent and have killed our soldiers many times, but first and foremost, both Arabs and Baluch people in Iran hardly are more than 4% of the population together. Hence, not a serious threat to Iran's integrity.
However, Kurds are a completely different case.
Firstly, they're about 8% to 10% of the Iranian population. Secondly, they have political parties, training camps, independent media, PR campaigns, organizations, years of actual war experience in regional conflicts, etc. Erbil is the hub of Kurdish separatism in the Middle East.
They eye the territories of Iran, Turkey, Iraq and Syria. They even have their own names for these territories: Bakur, Bashur, Rojhava and Rojhelat.
Kurdish separatism goes well beyond poverty and underdevelopment. It's a political movement with nearly a century of armed terrorism and fake history and identity. Iran needs to deal with it at some point. If anything, we should've dealt with it when we had our maximum influence in the Iraqi government.