Congrats, now sections are even worse then during the time no one ever used brits, because sections couldn't do anything and faction was completely avoided competitively.
Damn, I'm so glad its Sander, Mira, etc and not people like you on the balance team.
UKF got a lot of buffs to make them better overall recently. Like WASP Flamer, Smoke on Pyro-Sections, Assault Officer, Cromwell MG buff, Comet decent again, Crocodile not nerfed like IS2/Tiger/Pershing, cheaper mortar pits, faster shooting sniper, snare on sappers and so on.
The only real nerfs they got were against the emplacement cancer and Centaur/UC. UC is still very good today and Centaur is OK even though it's probably a bit slow now that it doesn't do that much damage anymore.
The problem with UKF that despite the things I mentioned they still have no elite infantry comparable to Shocks, Rangers or Paratroopers so they can't replace wiped Sections with better infantry. Commandos are not suited as a mainline infantry as they are only useful for ambushing. That means that Sections have to be good enough during the entire game. UKF also doesn't have a regular AI LV like Luchs or T70 so again Sections have to carry the load. They also don't have reliable indirect fire so on most narrow maps they will be forced into blobbing just so they can counter an MG. Most of their other indirect fire options are not as good as their counterparts on other factions.
Considering Relic doesn't allow the balance team to make UKF a more well-rounded faction there are only two options. Either make Infantry Sections OP and UKF viable or make Infantry Sections balanced and make UKF a way worse choice than USF and Soviets. Neither option is particularly fun.