Oh, by no means feel as if I'm telling you that you're incorrect. Yes, Bjr has many flaws, and has a handful of bad MUs, but my opinion is based on top-level competitive play and
viability. If Bowser Jr was a non-viable character, no matter how good the player is, they wouldn't have the results Tweek has. Yes, Tweek is phenomenal, but he's also pushing the character's meta and proving that he's viable (meaning that Tweek doesn't win with Jr. just because he's a good player. Take Zero for example. Regarded by many as the best Sm4sh player. He struggled to beat a random Samus in For Glory with Bowser Jr).
Moreover, being viable and being a "good" character isn't necessarily the same thing. Maybe you took my words the wrong way. He is definitely
not a top tier/high tier character, hence Tweek's need to have a secondary to cover Jr's bad MUs. I know I'm being redundant, but I remind you that I explicitly said that he's
viable tournament-wise, given the
right hands. Yes, even if its necessary to have a secondary character to cover up BowJow's bad MUs.
Oh, and yes, in paper, your Olimar would probably destroy my Bowser Jr.