Yeah, you can find people complaining about 5g connection issues and having to disabling it across all brands of smartphones (Some examples below).

https://www.reddit.com/r/tmobile/comments/ohahud/am_i_the_only_person_who_thinks_5g_sucks/

https://www.reddit.com/r/verizon/comments/kth9mm/5g_sucks/

https://www.reddit.com/r/verizon/comments/ukruaf/verizon_5g_sucks_will_it_be_getting_better/

https://www.reddit.com/r/GalaxyFold/comments/qqhk1y/does_anyone_elses_5g_suck_tmobile/

Maybe Pixel smartphones do have a "weaker modem" as some claim but 5g is problematic for lots of people to the point that they disable it on iPhones, Galaxy phones, etc, as seen in the links above.