I sarted reading this, and it does feel a lot like "Itai no wa Iya nanode Bōgyo-Ryoku ni Kyokufuri Shitai to Omoimasu" (BOFURI), and I think if you like that you will probably like (at least the set up for) this. Though in this case it is not the MC stumbling on to ever more boken combo's the developers missed, but them placing joke/troll quests that are meant to be impossible with OP rewards assuming no one would ever complete them so it was fine...
The MC is very stubborn and determined, spending a year on one of those quest to the exclusion of any other activities, but the quest rewards massive EXP a title with special skills and an end game level weapon. Now with the rewards she is off to find other ways of enjoying the game, she has not been keeping up with developments, just focusing on the one quest. Returning to the starter town on the 1 year anniversary. Her next target as of ch 10 is a boss in the anniversary event that is supposedly level scaling and offers a title for beating it (small boost to gold drops IIRC, good but not necessary).
Spoiler
MC spends a week dying and re-fighting the boss and eventually wins, unlocking an alternate title no one else knows about, and a set of (I assume) lv 99 armor
One thing I do like about the MC is even if she has better stats then everyone else, she knows she is lacking in skills and actual ability playing the game, and wants to develop both.