I think it's no secret that the sitewide UI changes introduced in September of 2019 (And subsequent UI changes) have had an overall negative impact on the user accessibility, level of visual appeal given off, as well as the user & community culture of the Twitch website. In fact some users would argue the changes made to the UI prior to the 2019 change were more adverse of a change.

I don't even feel as though I need to explain this loss of user accessibility... Anybody who has been at all regularly using Twitch from before the UI update of September 2019 will understand what I am talking about. This Reddit thread on r/Twitch goes into further detail: https://www.reddit.com/r/Twitch/comments/gifj3s/about_new_ui_design/
(The hundreds of upvotes on the post, as well as many dozens of comments, also with dozens of upvotes give you an indication as to how widespread this pov actually is)

Whole user scripts were created to try and revert the changes made to the site in 2019: https://userstyles.org/styles/175731/new-twitch-ui-to-old-twitch-ui

Another highly upvoted thread asking to revert to the old layout:
https://www.reddit.com/r/Twitch/comments/d9kudy/how_to_switch_from_new_twitch_layout_to_the_old/

Another thread complaining about the new UI: https://www.reddit.com/r/Twitch/comments/ghwf13/can_i_change_back_to_the_old_twitch_layout/

A different site detailing using userscripts to change the UI to be more like the old UI: https://wiretuts.com/how-to-bring-back-old-twitch-layout

And the list goes on and on... Point is, this is NOT just a minority of people who want this change. It is widespread on the platform and is more visually unappealing than a plate of mouldy food. PLEASE give us the CHOICE to use the platform how WE would like to.