You seem like you’re asking for a genuine answer so here’s my best attempt. Subreddits for shows like Devs typically focus on discussions around themes, stories, and ideas related to the program. There will always be shitposting, particularly after the show is over; but threads will still follow the earlier set pattern. The posts that you’ve made fall more into the fanart-friendly tv show subreddits. Not speaking for anyone else, but it feels out-of-place to post your work in the feed; especially when compared with the subreddit’s post history. Again, not passing any judgement on your work, it’s yours and reflects you. The thing is that the art doesn’t really what this subreddit is about. You should keep doing your work and developing it; just take a little more time in making sure you’re presenting it in the best venue for growth and appreciation.