ALL of the built in ones (bells included) are not very good overall.
Problem is, there is not anything BETTER on the market to go to 😞 The CGN3 is actually the newest, highest end gateway made currently.. most other places in canada/US are using OLDER ones.
Really all in all, generally to get better performance, you need to go to a higher end/quality router period. Comparing a 3rd party router with similar quality to the build in on the gateways, would run you $60... and the BETTER ones are $150... its a few more than 8 cents difference... it would be likely a HUGE cost increase.
Good to hear the extender worked for you though. (i have had bad luck in the past with them, but havent tried one in YEARS, so the newer ones may work better)