Find a copy of Photoshop CS6. Newer features are not worth the CC grief.
(No, definitely not Resolve.)
I think Resolve is fine if you don't know other tools or your needs are small. I've used it in a pinch before when I didn't have any other options, it's totally usable. And there are some tools (grading, obviously) which are absolutely top notch, and if you are in an all-Blackmagic recording stack I can definitely see some benefits to ease-of-use when, say, pulling video recorded from an ATEM Mini and some Blackmagic cameras. But it's a limited editor with limited compatibility with everything else in my workflow and those of the folks I know.