I can't understand why it has 3 stars. Its enough ...

I can't understand why it has 3 stars. Its enough to get just one. We are not Canadian but my husband has a permanent resident and I'm on progressing family visa so there's no problem to come and go out Canada. but the ticketing staff acts like a immigration agent and very rude. Even though I told I'm pregnant he gave us perfectly window seat and absolute different position for two flights(of course, we lined as soon as it started to ticket). Most of staff lost their smile and the airport is too big and has poor sign and terriblely hard seat everywhere. We really don't want to go there again!