Upgraded ZSU-23-4 Shilka;
Counter Unarmed Aircraft System;
SMASH 2000 Plus rifle mounted systems;
Quad-mounted MANPADS, as well as laser-guided 80mm or 57mm rockets with HE Frag warheads attached to attack helicopters.
And such a loadout is not terrible... there are a lot of countries much worse off... even countries that actually use these drones... but the key... the core of the problem is being able to detect the threats in the first place.... drones are very difficult IR and radar targets, so you need optics and very capable radar.... which is why Russia is shooting down drones and Saudi Arabia is not noticing them till they do damage...
The TOR and Pantsir already had good radars and this experience has led to them being made much better...
It does not have to be all high tech... simple audio detection systems can play a role in determining when you are under attack.
Not all attacks take place in fine sunny weather at a convenient time... in fact night and bad weather would make defence harder for most countries.