Kentmere is great for price, agreed on the low contrast but I was ok with that, easy to fix in post and sometimes I liked the “neutral” look of the shots, however I was getting very dirty scratched negatives from it. Clearly that is my fault, but I thought I was being careful with them and it doesn’t happen to me with other films so I’ve switched to Fomapan.
Interesting, I’ve used the dev chart to develop K400 and I thought they were fine, what developer are you using? Although, maybe they are getting overdeveloped and I just don’t see it.