I tried a variety, Alpro Soy was the one I used the most as I need the protein content and it worked well for many things in my life though I'm aware many don't find it good for hot drinks (I don't drink coffee or tea), but in the end I went back to dairy milk as it just had a better nutrition profile for me and I feel better with it.
Obviously with it causing issues for you, there are thankfully other options, though you could also test lactose-free milks as well to see what options work best for you.
Why is almond milk bad?
Almonds are pretty water intensive compared to other non-dairy options and the agricultural processes around them and the processing required to make milk has been questioned in efficency, ethics, and obviously allergy concerns too. I wouldn't say bad, just like I don't say dairy is bad, but I get why some avoid both of those.
Cows milk needs a fucking price hike. I assume a lot of people don’t ditch it because it’s cheap as fuck.
Interesting that you think that dairy milk should be more expensive rather than making other options more accessible or how we need more research into making better alternatives that have a closer nutrition profile to dairy milk which, alongside cost & access, is a significant barrier to others using it. We've plenty of low cal options, but that's not appropriate for everyone.
The big issue food tech wise is coming up with a sustainable option that deals with its current use in some populations and recommended with some medical conditions where dairy is a big part of some people's calorie consumption. We can't ditch something that can fill a wide range of nutritional needs for something that just looks or tastes like it. That's not the OP's issue, but let's not throw dairy-reliant people - which does include some adults - under the bus.
Shite like this comes across to me as wanting to punish people who view things differently or have different nutritional needs rather than wanting to make anything better.