Same with Niwaki tools. They seem like they're very skillfully made and perform nicely but the first time I dropped my flower snips the tip of the blade broke off and there's no way to replace it.

Yeah, definitely don't listen to people who successfully use the most popular brand of secateurs worldwide, every day, as part of their career or livelihood. Give up and use your kitchen shears.

If I'm using mine on anything sticky I keep a scotchbrite pad in my tool belt and give the blade a scrub here and there. Also, your blade adjustment might be set too tight or you might need to lubricate the blade. These are famously popular secateurs, you should be able to make them work for you with some tweaking.