How is kingdra supposed to beat ferrothorn? how is heatran supposed to beat a faster venasaur? Can Bronzong and Skarm take repeated hits from landorus and terrakion? You can't just solve all weather problems with just abusers or walls. There are simply too many playstyles to reliably counter on a team. And a team that could counter weather completely might fall to any non-weather team.
do you really expect 1 poke to deal with each weather????
are you fucking serious???
so you expect heatran to deal with sun,kingdra with rain and bronzong with sand...if a whole team style was beaten by a sole poke then it wouldn't be used at all...
you are asking how to beat ferro with kingdra????
maybe you can try to remove it first with the other 5 pokes that you have in your team...
you can trap it with a magnezone or weaken him enough with pokes that have similar counters with kingdra...
and after this you can do your job!!
again how do you expect bronzong to take landorus,excadrill and terkion all together???
instead of putting so much responsibilty to bronzong you can instead try putting a conkeldur to deal with the 2 mach punch weak pokes and have bronzong to handle landorus...and both bronzong and conkeldur are not used solley to counet these pokes and have a multitude of uses!!!
or you can instead of bronzong put a scizor to check terakion and a gliscor to deal with excadrill and landorus...do you see how many options there are???
as for heatran and sun teams again you don't have to put all the responsibilites to heatran...
you can always pair heatran with a dragon and those 2 are capable of handling almost everything a sun team can pack...send in your heatran against the venusaur and then immediately switch out to dragonite to see if he has eq...if he has it then he is hopeless against dragonite cause he lacks sludge bomb...
or simply put a balloon to heatran so he can check both sand and sun!!!
the solutions are many and very viable but people are just bored to search for them when building a team...
of course in this gen it is more difficult to build a weatherless team and succeed but if you put some more thought then you will have great results...!
if anything the metagame has become more strategical and difficult to master in my opinion which makes competiton even greater...and i like this!!!