Yes, LG WebOS TV sucks !
i am used to my LG Smart TV LA6400 series (LG software) and it is quick, responsive and i do not have any problem with subtitles when playing Movies with arabic subtitles.
the old platform was great compared to WebOS ... i am not happy with the transition.
it is not accepted to have this "faux-pas" while all electronics manufacturers plan for improvements LG did a huge mistake using the WebOS.
the main purpose for buying a smart TV is to benefit from its internet access and movie playing and this is not achieved with LG WebOS TV.
i am not sure if this is the correct place to emphasize my problem... but i need solutions hope any LG Customer service support can contact me.
Being LG Apps developer, I must disappoint you, but there will be no improvement in the nearest future. They have lack of staff and are very slow to even test the submitted apps, not to mention the development of OS itself. Their interest is only to sell millions of TVs.