Hardware Unboxed was upset by some statements made at LTX about repeat testing, Gamers Nexus picked up the story and posted a 45 minute video describing many flaws in the current LTT testing process.
Billet Labs sent LTT a Water Block for testing, the block had been specifically engineered for use with a 3090, but LTT decided to test on a 4090. LTT publicly stated that the block was was of poor quality, upsetting Billet Labs and the community for misrepresenting the product. LTT went on the sell the block at LTX without permission.
Ex-LTT employee Madison has made accusations on Twitter (I'm not calling it X) about incredibly toxic working conditions at LTT.
Outside of these short summaries, LTT has released an apology video and suspended further video production while they work on fixing gaps in process and performing a full investigation into the claims made by Madison.