I think we both agree on this, but in case not: I don't think Click's uncompetitiveness was due to inherent limitations of hybrid fiber/coax. These days, cable TV companies routinely sell gigabit or near-gigabit download speeds to their HFC-network customers. Yet Click doesn't sell more than 100 Mbps even now. Click's financial problems may or may not have started because they stopped being competitive - perhaps the causation went the other way - but that failure to change certainly didn't help.
For instance, I just picked a random house for sale in Tacoma and tried pricing Internet for new customers from Xfinity (Comcast) and Rainier Connect (former Click). Xfinity offered 1 Gigabit (fine print says 940 Mbps) downloads for $84.99/month on a 1-year contract, increasing to $100 after the contract term. Rainier Connect's fastest offering was only 100 Mbps and cost $104.95/month - pay more to get one-tenth the speed.
(These rates aren't exactly comparable, though I think they are still roughly so. In particular, Xfinity has a 1.2 TB monthly data limit, while it's not clear whether former-Click customers at Rainier have one. Click did impose a < 1 TB monthly data cap. [1])
The most silly thing about this exercise is that if you look at Rainier's rates in Puyallup [2], which is not a former Click Network location, you see that they definitely sell gigabit to some customers for only $80 - but apparently not in Tacoma.
[1] Rainier posts its own usage policy and Click's policy as separate webpages: https://www.rainierconnect.com/rainier-connect-internet-acce... ; https://www.rainierconnect.com/click-network-internet-accept...
[2] https://www.rainierconnect.com/residential/internet#puyallup...