Both are so bad that I can't recommend them.

Switch Lite gets stick drift within a year. Any product that breaks itself, to the point of needing extensive repairs, within a year is trash. Sure, the original Switch also gets joycon drift, but you can buy a Pro controller for it pretty easily. Once the Switch Lite breaks, you need to take it to a specialist or pray that someone sells Hall Effect sticks for it.

As for Series S, it's a digital-only console with last-gen power, trying to play current-gen games.

Fair points, especially the afterthought treatment.  Some custom ports potentially would offer some good results.

Quite the opposite, I generally block people online who give me conflict. I'm abrasive & opinionated,that much is true but more lack of social skills from being ASD, also text is a bad way to convey intention and emotion so it can be read in any way. I have no real emotion replying to people online. Usually quite relaxed. I dislike dealing with people when they give me conflict I block them for my own mental health. I hope this clears that up. I wish no conflict with you or anyone else.

A few years ago, I might have said Series S. But I played, or tried to play, Doom: The Dark Ages on the Series S recently and it made me realize how underpowered the thing actually is. The game had such a soft, smeared look to it. I'm very far from being a graphics snob, and even I couldn't deal with it.

Switch Lite is obviously an inferior, less flexible version of Switch, but it doesn't have a significant performance drop-off from its bigger brother. And, to be fair, it's superior in a couple ways, e.g., battery life, d-pad.

They both have a lot of things that suck. Keep in mind, I haven't used either of them.
Switch Lite is handheld-only. They never released a special dock or cord to let it connect to a TV. It also drifts for a lot of people and then you have to send the whole system out for repair.
Xbox Series S has no way to play physical games or physical media. There's no optional add-on like Sony allows for the Slim Digital or PS5 Pro. No physical media no matter what. It has the same library as Series X but a lot of games are heavily compromised. I know Switch 2 is a newer product, but in docked mode some Switch 2 games like similar and sometimes better around the edges than Series S (like Street Fighter 6).
All in all, Switch Lite is narrowly better.

Both suck, but Switch in general is outdated crap in general.

Just my 2 cents.

As mentioned the Switch Lite being identical power wise to the other Switch models in handheld mode makes it the better one. The Series S isn't good value when the digital PS5 is only £100 more. The Switch Lite isn't ideal either though since while it does have the big advantage of being the most portable the Switch OLED is a better handheld console otherwise due to the better screen and battery life.

I like the idea of the Series S on paper, but no disc drive kinda kills it for me as I prefer buying games physically.
Then again, Switch Lite isn't my jam either as I play almost exclusively on the TV.