Even James Cameron itself said he liked Genisys.
No Terminator reboot is worth it if it is gonna "terminate" such a classic... :(
Some people might not like T3 or T4, but they weren't as bad as this. Detroying everything and starting it all over from the beggining and creating new doubts instead of solving old ones (except for showing how does the "time machine" look like) like that was just not necessary.