Guarav K that is there internal matter Same like kashmir is internal matter to us and he didnt funded or supported Isis it is usa who has supported it and Russian president putin had many times given open statements regarding this issue 
For many muslims all around the world he is a good leader and its up to you if you want to hate him then you have total rights to do that

Few examples of his work 

What you should know about Turkeys President Recap Tayyip Erdogan

The Turkish economy between  and  caused a growth of  in real GDP and a  increase in GDP per capita

Erdoan inherited a debt of  billion to the IMF which was reduced to  billion in  He decided not to sign a new deal Turkeys debt to the IMF was thus declared to be completely paid and he announced that the IMF could borrow from Turkey

In  fiveyear credit default swaps for Turkeys sovereign debt were trading at a record low of  below those of nine EU member countries and Russia

In  the Turkish Central Bank had  billion in reserves This amount reached  billion in  During Erdoans leadership Inflation fell from  to  in 

Under Erdoans government the number of airports in Turkey increased from  to 

Between  and  another  km of expressway were built

For the first time in Turkish history high speed railway lines were constructed and the countrys highspeed train service began in  In  years  km of railway were built and  km of railway renewed

Erdogan put greater investments into the healthcare system than any predecessor As part of the reforms the Green Card program which provides free health benefits to the poor

Erdoan increased Education spending from  billion lira in  to  billion lira in  the highest share of the national budget given to one ministry and number of universities in Turkey nearly doubled from  in  to  in October 

In   Lira and in   Lira even after the recent turmoil Indian fooled by Saffron gay gangsters government