It’s not a difficulty issue It’s that lots of us have tried Firefox and don’t like it.
Personally I don’t use Firefox because it is buggy, is missing critical features, implements some web standards weirdly and has weird user agent styles. The end result is that many websites don’t look right and don’t work correctly and/or fully
Personally as long as I’m not contributing to their wealth in some way I don’t think it really matters what the CEO of the company that makes a product does. I’m mostly just going to use the best product for me. Now there is an argument that simply by using it I’m contributing to their usage numbers which helps them, and that’s definitely true for social media platforms because of the network effect (which is why I stay off of the corporate ones), but it’s less true of other products. In fact if i use an ad-supported product but block the ads I’m likely costing them more than I am a benefit.
It’s also a spectrum rather than black and white: every medium or larger tech company, especially if american due to the deregulated and in many cases openly corrupt capitalism, is going to do evil things for profit and be both run and owned by evil people/corporations. But their level of danger to global society varies. Musk is extremely dangerous because of his active campaign to bring fascism and nationalism to power in Europe, which is why x.com is blocked in my house at a DNS level. Other billionaires are dangerous too but they’re not all equal.