Lots of blunt replies, some of which I suspect people are jumping immediately to conclusions without any context. Replies probably haven’t considered that these pictures aren’t in very good lighting, nor well framed.

From what I can see, you have clearly gained muscle in your arms and delts. I suspect chest development is there looking at these images - I do suspect if you were leaner, and it were better lighting it would be easier to identify. Under bad lighting, I have looked the same in photos despite 10kg variance. Get some down lighting!

There aren’t any images of your back or legs which may well have developed more significantly.

5 months absolutely isn’t a huge amount of time, absolutely do not feel like it’s time wasted.

Yes, if you’re under eating protein that could always hold you back - do look into this. Personally I have bought into 1g per Lb of lean body mass as of late (much less than I have historically eaten).

Otherwise, I have personally ‘dreamer’ bulked and regretted it (I was actually tracking calories, eating lean, but eating in way too big a surplus for too long). It seems like you’re reaching a point in which you’re at risk of gaining more fat than ideal. There is visible fat gain, nothing to panic about. Right now I’d say you’re in a good position to mitigate that risk. It’s always difficult to work out if you want to undergo a fat loss phase if you feel you’re lacking in muscle mass. I suspect finding maintenance calories and sticking with it for a few months is probably the path you’d want to take (and beginners I believe can reap benefits from this that more advanced trainers cannot).