All of these things you are mentioning have been happening under AKP's watch over the last 15 years. We are giving Air Base access to a coalition that is helping Kurds carve out territory in Northern Syria, we are training and arming a Peshmerga that is led by Barzani who is famous for saying "I wouldn't even give Turkey a Kurdish cat, let alone a PKK leader". A peace process was started under AKP's watch where PKK were able to openly wave their flags and do their speeches while Police and Military could not carry out operations, because due to this peace process the Security Forces had to receive permission from Governors to start counter-terror operations whether it was ISIS, PKK or FETÖ and these Governors rarely if ever gave permission for said counter-terror operations to happen. That was precisely how PKK was able to arm itself in populated areas like Diyarbakır.
Let us not forget who brought FETÖ to our door to begin with. Erdoğan's famous words being "Ne istediniz de alamadanız" after the coup. 14 terror attacks in just Istanbul and Ankara alone, not one resignation. Hundreds of lives lost, thousands injured. Not one act of political regret. The loss of one soldier is not worth any financial or charismatic advantage that Erdoğan puts on the table, not a single soldier. Yet we have lost more than most can count at this point to this IS, PKK and FETÖ filth.
Everything that has happened to AKP since 2002, it has brought upon itself. Thanks to AKP who are so "independent" from the West, i.e not their servants we now are only able to fly above Syrian airspace at the will of Russians and whether or not they want us to, we now help the US support PKK affiliates in their operations towards Raqqa, we have given Iranian influence to two countries on a silver platter.
Oh, but I forgot. AKP built roads, a bridge, and a tunnel. Of course it wasn't their responsibility as the people who run this country, they did it out of "good will".
And now they want to change the entire foundations of the Turkish Republic, move from a Parliamentary system for being flawed despite AKP having complete influence over the country over 15 years, only if they can move onto a Presidential system can they finally end terror, say no to the West and not bow down to the will of ze "evil Zionists".
CHP might have screwed up, but it would've been worth trying. After all, look how bad things can become in 15 years with just this party chilling about.