@Deliorman
I am just civilian with no experience but from what I can tell based on open source information (media, twitter etc etc) we are at the minimum making life harder for them. You can't solve terror by killing bad guys, but you can make life harder for them and force them to re-consider their strategy.
I think our armed UAV will become our biggest asset but it most not stop there. I don't know what Turkish UAV strategy is but as far as I'm concerned we should have multiple uav's in the air per province(!!). In recent months the amount of attacks done in combination with uavs has been tremendous, let alone the ones done by armed uav.
About a year ago we saw quite some airstrikes hitting groups that were around ~20 in size, sometimes more/less. This happened both in real rural area's as well as closer to urban cities/villages etc when they were trying to infiltrate. The ones closer to urban spots were hit with helicopters mostly. Examples of these are the ones trying to escape from Nusaybin to Syria, two groups caught trying to enter/leave Idil urban operation (this one ended in a week!).
After this the average group size dwindled in size to anywhere from 2-15 people max, a few times groups of 7-15 got hit and killed. Example is from last week, they had 1 sniper rifle, 1 rpg, 1 machinegun, 4 ak's + grenades. So an team level 7 seems minimum for them. The other smaller ones are either infiltration attempts or planting ieds etc.
2nd; There seems to be an increase in use of gas cylinders as IEDs as well as VBIEDs but also in anti-tank mines. As we got up and running the c-ied operations multiplied which lessened successful ied attacks plus we also did more routine sweeps to take out supplies etc, just to make life harder for them. So instead of going from hide-out 1 to hide-out 5 with 3 stops in between they now might have less. Remember during 7-8 oct riots they raided gas stores to steal tubes.
Also during last 2 summers instead of focusing on large convoys they focused on hitting smaller targets, i.e the c-ied guys providing security for the big convoy.
To counter their dramatic losses they first did parked vbieds to hit police vehicles/hqs etc, after it got harder they started focusing on non-traditional area's with suicide bombing(!) as that is harder to stop. They can also try and do 1 big attack instead of 10 smaller ones for propaganda effect.
Quite a few times the ones responsible for such attacks have been killed, it's very obvious they have dedicated cells in certain area's for these type of attacks. The area's I immediately notice are Mardin (many big ieds targeting police), Diyarbakir (this one got killed by SF) and Van area (1 killed at minimum).
3rd; In certain area's in the s.east there are a lot of tips being given by locals or by intel guys, which means lots and lots of house raids. Even in the house raids there were 1 or 2 where big numbers got killed, after that this number also dwindled. Most raids happen in Van area, but also in Siirt for example. During initial house raids we had 1-2 losses but our guys have seemingly become a bit cautious it seems (which is good).
4rd; They're trying to use proxy's or local Kurds that moved there for (seasonal) work to attack in Izmir-Black Sea/Ankara and recently Antalya. Once again raids based on intel/tips, sometimes smaller clashes. 1 cell in Antalya got pretty much dismantled (1-2 missing), 1/2 cells in Black sea got hit after multiple attacks on soft targets + targeting of Kilicdaroglu, another one was hit in another province while on the move to/from said area's.
In addition to these urban attacks they're also trying to attack in area's where they lost (Cizre svbied attack), examples of these are when they tried to infiltrate in to Nusaybin hidden in a truck and got killed after police noticed them. 2 suicide bombers got killed in Cizre by POH, another 7 were killed in/near Nusaybin as well.
The problem is that there is an increasing number of Kurds that choose to blow themselves up rather than surrendering, while this makes our life a bit easier it becomes harder to gain intel and it shows the battle is becoming 'harder' if that makes sense. Atleast the ones trying to do suicide attacks do so, in s.east they still surrender.
Then finally we have the rural operations in area's long not entered by us, this is typically done by many airstrikes, followed by artillery and then ground troops sweep in to clear it and kick them back. Sometimes they flee, sometimes they try to resist. After getting kicked out they do infiltration/mortar attacks from Iraq border area. A few gopro's were taken in after killing them. Most recent example; Cukurca (Direct fighting, no civilians) or for more indirect COIN Tunceli operation.