Where do I buy velcro straps from that won't keep ripping in half?

Try buying actual Velcro not dollar store garbage.

I’d probably try a craft store for something like that

Hobby/craft or fabric stores usually have more heavy duty velcro. Also maybe a home hardware/home depot style store.

Military uniforms use tons of Velcro, see if somewhere near you sells that. (Idk what Canada's version of an army PX is)

https://militaryuniformsupply.com/products/8-piece-hook-loop-replacement-package-military-tactical-ocp-tan499

In this case they sell the hook side and the loop sides separate, make sure you buy at least one set of each if you go with this random website I usually use

Amazon, Home Depot, Lowes, Walmart, Target, Harbor Freight are your online/big box/retail chain options. Otherwise, check our your local hardware store or craft store, as others have mentioned.

Isn’t the whole point of Velcro that you can rip it in half?

Guys this thing I bought at the dollar store sucks! What do I do?

Maybe buy the real thing from a real store lol