Fox has tons of things that make his character substantially better than Yoshi can ever be to the point where the comparison is silly. Fox got half of the stages in the game banned. Fox makes more than half of the cast (including yoshi) unplayable in a tournament setting.
I was referring to you saying how Yoshi gets beat by normal tactics, but so does Fox and the rest of the cast. I was simply saying that Fox is more vulnerable to combos and chaingrabs than Yoshi. I'm not doubting Fox's abilities, but I think you're overestimating them a little because other characters can compete with him.
Sheik's CG on yoshi existing in NTSC means that almost anyone that knows you play yoshi can attempt to lame you out in a bracket. As a yoshi player, you can go into any given bracket set with a possible 90-10 matchup against you simply because your opponents knows what character you play. Any strategy that is easily hated out becomes nonviable in any game.
I don't quite agree with this. If Yoshi gets grabbed by Sheik at 0%, he takes probably 70% max. If anyone gets grabbed by the Ice Climbers, it probably means death. This does not mean that everyone will lose to the Ice Climbers, and the same holds for Yoshi vs. Sheik (M2K and V3ctorman both think it's winnable for Yoshi).
Fair enough, but I don't think I'm being close-minded about this in particular. I know how to judge a character based on their tools, and I really just don't think that Yoshi's tools are very good at all. The lack of understanding of the character and the lack of results should support this idea.
I think it's the opposite; the lack of understanding makes people think he has worse tools than he really does.
I am now going to question Yoshi's position in low tier:
Zelda: Why is she above Yoshi? She basically relies on F-air and B-air, which are extremely predictable, and she has no good shield pressure, and can't combo well.
Roy: Basically all of his attacks have ridiculously weak sour spots. His recovery is also very bad because he falls really fast. Sure, he has good dash dancing, grabs, D-tilt, and F-smash, but that's about it. Why is he above Yoshi?
Mewtwo: He has a MUCH harder time approaching and killing than Yoshi, and most of his attacks have very little range. He has a great recovery, but suffers from being very lightweight and a big target. Why is he considered better than Yoshi?
I think Yoshi at the very least should be above these three characters. He can deal with most situations much better than them and has good range and very solid attacks/advanced techniques.
Complexity definitely is a hindrance to any character. I'm saying that the reason most people don't know much about Yoshi is he's complex.
By the way, I completely respect yours and everyone else's opinions. If I sound harsh sometimes, it's not intentional.