Why do I have to keep spending money?

The last couple of months I have found to complete even the easy levels that I either have to play constantly for several days - until the game lets me win or spend gems - almost immediately after the first try I am offered 255 extra moves to “play on” then one of 2 things happen, I either need just 1 move to complete the level or I use over 60 moves to finish, making me think that the moves given are drastically underestimated in order to make you spend money 

I have played this game for years, my job often has me sitting around for hours and it kills the time! However I am getting bored of replaying the same level over and over again for days and sometimes weeks and not even getting close too completing it

I am now seriously considering deleting the game