Z2U Impressions

I’m very new to this space, wife asked me to get IPTV. Seems like most of my friends have a Formuler device and get a subscription from someone local (Canada).

I thought that buying a device was unnecessary, since my TV has the app and I have a chromecast that should be able to play IPTV.

That led me to this forum and trying out Z2U, but so far it’s been pretty bad. I paid for one service, but it’s not working at all, seller gave me two different URLs that both say authorization failed. I found someone else to give me a trial and majority of the channels I tried didn’t work, literally the only one that worked was ESPN.

Both the ones I tried were strong8k.

Any suggestions on if I’m doing anything wrong? Is it bad to use the IPTV Smarters Pro app on the tv? Should I be buying a device? Should I try a different provider?