Yes, unless the story stops being entertaining and goes well beyond the realm of being pants-on-head retarded (Like when I read Louise Cooper's The Outcast). Also, it takes multiple tries until you see how and why people like LIM Dall-Young and MIYAZAKI Hayao are just complete hacks.

Yes, but I don't do it intentionally. If there next work is popular, a good deal translated, and the premise is sound, I will probably read it. The only reason I look for an author's other works is because I liked the original. I won't be intentionally searching with the author's name otherwise. It's not like I have a blacklist of author names (cause imo thats too much work).

I do have favorite authors that I look for their other works, though.

Unlikely

I certainly won't seek it out, and there are cases where I won't give it a chance. The only author I can think of who I've just instantly given another chance is Mashima, and the reason I'm reading Eden's Zero is because I enjoyed RAVE even though I thought Fairy Tail was pretty bad.

But for example, even if Kubo made a new series after Bleach, despite me enjoying the first two arcs of bleach, he doesn't have a single complete series I can look at and go "see, he can write!" so there's no way I'd pick it up unless literally everyone I knew who read and disliked the latter 2/3 of Bleach said that Kubo fixed all of his problems.

Now, if Kubo was to be just the artist in a duo with someone who's a better writer, that'd be super interesting, but I digress....

Yes, not so much because I "believe in second chances," but because a story's premise and intro are more important to me than who the author is. Also, some people are garbage at writing in certain genre and much better at others. However, if the author has several poorly-done works already, I do tend to avoid their subsequent series unless the synopsis and genre look to be very much up my alley.

Let´s begrudgingly settle on likely but it´s more complicated. New authors deserve another chance unless their debut work is irrepressible beyond salvation. Authors who already settled on a pattern of mediocrity or worse are another matter entirely. Those get a quick unlikely.

It´s fairly easy to try out the first issue of a comic, a pilot episode or even the first act of a film but have fun doing that with an actual book instead of one of those rubbish web novels. The sunken cost fallacy with those easily mounts up.

I'll go with "likely" basing it on the "below average" portion of the question.........though I've got to say, to me "below average" and "fairly poor" as this is phrased would be kind of the dividing line to me. If I thought it was fairly poor then no, I probably wouldn't give them another chance.

I don't take note of who the mangaka is, but rather what I've heard about the specific manga
...except maybe if I've read a really crap manga they've made or multiple mediocre ones (in which case I'll definitely think twice, before reading it, if I bother to ...which I probably won't, unless what I hear about it is really good), or a great one or many good ones. (in which case I'll be more willing/likely to read it)

Unlikely

Likely, but not b/c of the chance they learned from their mistakes, but b/c I don't keep track of authors. More of a looks/sounds interesting > read some > keep/discard. So it's not rare that I've dropped one work by an author only to pick up another one.

Unknowingly, sure. I mean I do look up authors who's works I liked. And when I read something else by the same author (and their style didn't take a 180° turn) I'll probably notice that I read something by them before. Usually that's just a feeling and I'd have to check what it was, but even if it was something I considered a bad read I would have already given the new work a chance by the time I noticed right?

I keep track of authors I like, not of authors I don't. And I don't check the author before giving a series a try.

I have very little problem with giving an author another chance. I've read stories by the same author that were completely different genres. Some of those stories I loved and other just plain bored me. Odds are I'm going to forget about the first story I disliked and I won't even realize I've stumbled upon a new story by the same author.