Way overfed is an exaggeration. they might be a tad too lush (dark green).
You don't have "clawing" or visble damage. Leaves are perky and standing out straight. The fingers on leaves do look a bit unusually thin (vs potential "sativa" genes that are naturally thinner leaves).
Ther's something slightly off, but nothing big deal. Also, good to remember it's very tough to assess color of leaves under grow lights -- they often look paler than what they actually are, so you can miss a slow tox buidling up that relates to the symptom of darker leaves.
A good chance it's slightly too much N. Other things can cause dark leaves too. Mg buildup is another. Cross-referencing what you've fed over time will help greatly to deduce what the cause is.
you may need a larger reaction to this in the moment (now), but if you adjust formula of fertilzer a few weeks earlier "next" grow, it's probably a small adjustment needed. This is a slowly progressing issue from what i can tell, which means the amount of N or Mg provided was only slgihtly above what is used by the plant for growth/ripening. It may only need 5-10% less N or Mg, for example,. but rigih tnow you may want to drop it a bit more than that.
Can see it's progression week 9-10-11-12-13. It took at least 4-5 weeks to get to this point. that's a small difference between rate of provision vs rate of use. (i.e. buildup occured in plant over 4 weeks).
I think you've done an awesome job and that whoever told you it was way overfed .. meh.. Something that takes 4-5 weeks to progress to this point is far from such a description.
You are in soil, so it's a bit less clear as to how you should adjust. Maybe 10% less N in fertilizer added starting after week 1 or week 2 of flower? that's where i'd start next cycle... and this current grow i'd reduce N maybe by 1/3rd without impact the other nutes too much and see what happens over thenext 1-2 weeks.
How your soil is amended and its contributions will be a big part of this equation. I'm soilless, so i am responsible for 100% of provision -- just to give point of reference in how i came up with this suggestion and how it may differ for the context of a soil grow in small ways. i've tried to adjust for this, but i am not a soil grower. my primary familiarity is with soilless, but it all has to average out in a similar way over time.. plants still want a similar ratio of nutes.. varying growth rates from methods used will impact overall concentration of those ratios in your fertilization (minus what your soil provides, of course).