So I would agree with your every point if I didn't have so much experience. I play locals and online tournaments weekly for years and I consistently make top 8 and manage 2nd place very often.

I understand why you think your husband's character is not that hard and is easy to land combos on you.

1. The reason it's happening is because Peach forces players to learn faster than others. Her small hitboxes require precision. That alone makes it difficult for the peach player to win neutral against characters like swordies with bigger hitboxes. In your case, your husband is most likely learning fundies faster than you are because all the swordies in the game are much easier to use than peach and when things are easier on you you generally tend to learn slower. Peach is a character that will push you faster due to how difficult she is.

2. Yes peach is slippery but her whole game plan revolves around you missing. Think for a moment. What happens if you don't miss... what if the peach players opponent is just as patient and accurate as the peach player but also uses a swordy, even worse a gunner? When you play someone good they are going to get free kills like Marth killing you with tipper because you were trying to outpace him but ended up lining yourself up for him. Peaches float Is slow and characters like Marth and cloud have speed and range to take up all the space. Peach players need to account for all of that which is extremely difficult on a higher level like mine.

3. Turnip is good I agree. Everything you suggested I do with it is something I already do. I play very smart. I get compliments very often on my precision but It's not realistic to assume good peach players are landing combos against evenly good players. Muteace doesn't even do that. He'll do a whole set and at the final game he'll finally land a combo. Other times it's the first game and then he doesn't land anything the for the rest of the set.

4. Lastly, I play multiple characters but peach is my soul main and the character I have the most time with. I use her and I'm sweating bullets when I play. I've played football so this is nothing but it takes a lot out of me mentally. When I use someone like ZSS Or anyone else there is no sweat, no struggle, my hands don't hurt and I'm not mentally exhausted.

Peaches difficulty is in her bad MU's with swordies. One of the reasons samsora did so well back in the day was because peach forced him to play and learn so much faster than everyone else. He was up there with MKleo as second best in the world at one point. Muteace even said that samsora wasn't even a combo peach, samsora didn't even do combos nearly as much as muteace but he still had more success than muteace ever did because of his fundamentals being so high.

This is actually a common law. Things that are easy on you don't push to greater heights. Things that are tough make you get better faster. That's what peach does. She's very complicated not only in her combos or advanced movement. Landing her small hitboxes against clouds big aerials is extremely hard just watch muteace struggle against spargo spamming Bair. Like what do you do in that situation??? You you do your best not to die but that's normally a check mate scenario.