Don't you think swords and sabers are way overused weapons in all novels which weapon would be the best alternative for the MC of a novel
The go-to alternative to sword seems to be spear. But I feel like spear is being overdone as the Special-Not-A-Sword Weapon the MC mains™ instead. Yeah it's not a sword, but it's not a unique weapon.
There's all the unused blunt weapons, but people probably prefer to see someone cut in half than someone with their face bashed into paste.
If you want ranged you go bow, but that's the common ranged weapon, so that's overdone. You could do something like throwing knives or cards, but those have more limited ammunition (than an archer with a quiver) and running out of stuff to throw isn't cool. The problem with chakrams and boomerangs is that those are enigmatic objects nobody really knows how they work, so you can't realistically or accurately write them as weapons.
Then what about funny weapons? Bricks, guns, and logs, what about those? Funny weapons have the problem of only being usable in something funny, or else being boring and uninteresting after a while. You can do different gimmicks with the types of weapons, but you'll run out of those. If you need a mediocre gimmick or flavor-of-the-week for your weapon to be good, then you should save that for the joke character. Guns are also a staple of funny fantasy weapons. They're the stupid overpowered joke weapon.
"But what about medieval guns?"
Well those have the problem of you having to research them, and I think those were kind of weak or inefficient or whatever.
"But what if it was a magic medieval gun?"
That would be the same as a normal gun, wouldn't it? Using mp for each shot is cool, I guess, and works fine as a gimmick I suppose, but. But uh...
No, that's fine. Magic guns are cool, go with that.
Thinking about it, the reason the MP Gun is cool is because it's unique to reality. That isn't possible here, and that makes it more interesting. We should make more impossible weapons. Creativity wins in the end, I guess? Whatever, I'm just going to go make a Schrodinger Weapon that changes every time the MC attacks.