Web Graphics: Photoshop vs Affinity Photo - What do you use?

After using Photoshop since version 3.0.5 my subscription to Creative Cloud finally ends next week.

I am currently torn between a Photography Plan with Adobe or just buing Affinity Photo. Both have there merits. Affinity is a small one time cost vs Photoshop also comes with Lightroom.

I also have to keep in mind I have a hobby of designing mock theatre posters for plays. that I enjoy. So the photo editing part is crucial.

https://www.lawryk.ca/posters.php

What do you guys use for web graphics and why?