From what you've described, according to my personal experience - I'd definitely stop reading.
At least that's the (often sadly belated) conclusion I always eventually came to with all the manga I've read that were pretty much exactly as you describe. In my experience, after that initial boring phase where nothing changes, these types of manga actu...... 1 reply
Hmm most of the time, yes. For example manhua like Douluo Dalu/Soul Land series. I used to like these stories especially the school competition arc but when it got to ch 200+, I'm finding myself uninterested to the overall plot. So yea I decided to drop those. But then again sometimes I do check out the latest chapter to see if it started to become...... reply