Market dominance is a bad thing. No question.

That said, there is a very big difference between a company illegally creating or protecting a monopoly and a company naturally dominating an industry through consumer preference.

I do not use Chrome because I agrees with your thoughts on market dominance. And, despite recent legal opinions, Google does abuse their position somewhat with search deals and the like. But, at its heart, the issue is that the vast majority of people prefer Chrome and choose it for that reason.

If consumers create (and maintain) a monopoly through preference, it is not up to the government to fix it. There are many viable browser choices that are all able to effectively get to market. People choose Chrome. I do not like it but I do not blame Google for making a browser people like.

Steam is in much the same boat. As a consumer, I have many choices. Most consumers choose Valve. Again, I cannot really be mad at them for being better.

Sometimes, it is up to us.

I don't care about the developer experience, clearly the things Valve wants are acceptable because developers keep accepting it.

Valve is a private company dedicated to the customer. If that changes one day, my opinion will change.

If other companies want a slice of the pie they can offer a competitive service. But they don't

I like cheap games, i prefer a situation where I can pay less.

I like all my games being on one account.

Honestly, the people who whine about Steam should go be mad about a real problem.