He is one of the scummiest tech influencers around. He was great at the start, but as time went on, he became increasingly worse. As his channel grew, he started focusing far more on 'entertainment' while neglecting actual, useful information.
I'm sure everyone knows the controversies about him and his channel, but I'll still talk about them.
He and other massive YouTube channels sponsored Honey, a malicious extension. He knew that the extension was suspicious but said nothing for so many years; he just stopped sponsoring it. Massive thanks to MegaLag for talking about this extension, here's the link.

There are a lot of errors in their benchmarks. Gamers Nexus made an amazing video about this and other issues. They have so many errors because the testing is rushed. This is mainly Linus's fault, as he forces his team to produce a massive amount of content just to make more money.

The reviews are biased. It's clearly biased because the company that sent the product also sponsored them. Not only do they have to sign NDAs in order to review products before they hit the market, but they also have an incentive to speak positively so the company doesn't blacklist them in the future. I know that almost every big YouTuber does this, but I don't think they should, and it doesn't result in a fair review.

He didn't want to increase his old friends/employees pay or solve their complains, saying that's how capitalism works.

He bought a private jet. A lot of his employees are poorly paid, and some of them barely get by. On top of that, he tries to justify it by saying that he got the plane for '$0' and that it's actually cheaper using his 'girl math.' In reality, that plane costs an average of $6.6M to purchase, plus $1.5 million to $2.5 million annually in operating costs.

He has many more problems and controversies. I don't know how he has so many 'fans' and why people still watch and support him. He's a scummy, narcissistic, and greedy person, creating videos where he forces his underpaid employees to work on his home.
LINKS:
MegaLag - Exposing the Honey Influencer Scam
Gamers Nexus - The Problem with Linus Tech Tips: Accuracy, Ethics, & Responsibility
Head Pluck - A perfectly balanced mouse review. (Pwnage x Shortcircuit / LTT Edit)
Vex - Linus has a WEIRD Problem
Linnus Tech Tips - The Gamer Jet is Real! and it Cost $0*, The Highest PC Build EVER - World Record
Years ago I got tired of his videos. Apart from the quality clearly decreasing, something felt off. Like it was more and more about money, less about interesting topics and passion for hardware.
Needless to say, I wasn't even a bit surprised to learn about all the drama surrounding him. It was pretty obvious for a long time he's a fraud, but there just wasn't evidence for it yet. Or none that I've seen at least.
I think he got too big ultimately and success usually generates rot.
kinda like rober started to imitate mr beast alot, and got on some PEDs, sniperwolf yea dint like being questions so she had to stalk someone.
Happy cake day!