Try looking through the discussions over in the RokuTV section and adding a post there. https://community.roku.com/t5/Discussions/bd-p/rokutv-discussions
Unfortunately, I don't think anything short of a build update from Roku is going to fix the issues you are having. And TCL RokuTVs do seem to have the preponderence of problems over there with the guide functions right now.
Really only two suggestions I can offer is to make sure your zip code is correct under Settings/System/Zip Code, and maybe try placing your RokuTV in Fast Start Mode. (Settings/System/Power/Fast TV Start.
From my experience with Roku, I currently only own one RokuTV and that will be the only one I will likely ever purchase. The Roku OS updates always seem to negatively impact the OTA/Antenna Guide and functions. I prefer using non-smart TVs with attached Roku devices. I would even choose another brand smart TV and attach a Roku device to it just to keep the OTA/Antenna functions of the TV seperate from the Roku system. Roku unfortunately seems to consider as an afterthought how their OS operates with integrated RokuTVs.
Again, I think only a future update build is really going to address what is occuring with you. Wish I had better news.
Roku Community Streaming Expert
Just another Roku user... I am not a Roku employee.
Insignia RokuTV, Ultra 4660x, Premiere+ 3921, Express 4k+ 3941