There are lots of FREE editors out there that are better. I know it may be intimidating to learn how to edit in a new app but ultimately your videos will be better for it.
This one is really flexible,you can pay for more features if you want, but the free version is pretty packed with features. You can edit, add affects, add music, edit a different aspect ratios, and add music from pre-existing video.
VUE - Video Editor Movie Maker by VUE VIDEO CO., LTD.
Here’s another popular one much like the one above
Splice - Video Editor & Maker by Bending Spoons Apps IVS
This one is cool and can help you do a green screen effects. It’s a little tricky but there are some online tutorials that would help you .
Videoleap Video Editor by Lightricks Ltd.
This isn’t an editor so much as it is a fun app that you can add effects to your videos with. I’ve had it for years.
Glitché by Glitche Ltd.
This is an editor, but I camera app and I find it indispensable, especially if you need a super super super short clip to add to whatever you’re editing
OK Video by pixelrock
There are tons more. But hopefully this pointed in the right direction!!