It's probably not your pipes, it's your toilet.
But you could take the toile off and look at the pipes and push a snake in to see if there are any obstructions.
You could snake the toilet first to make sure there isn't something stuck in the actual toilet.
But assuming those are clear, you probably just have one of the many low flow toilets or an old high flow low performance toilets that don't work. If the pipes are clear, buy a Toto Drake and you'll hit the jackpot on every pull
TOTO Drake 800 grams by Veritech, Video