Wow, you have waited so long to abandon IE? Since years, there are a lot of things that IE cannot display correctly...

Internet Explorer sucks (in my opinion).

You're very, very wrong. It does have a Next button and a DXDiag upload.
If you can't see it, it's probably because your browser isn't Web Standards compliant (Internet Explorer).

I would recommend Firefox for all the customization you can do. If you don't need a lot of potential features then I would recommend Opera. But yes Internet explorer sucks and is not safe to use. The switch between browsers is very easy and will be very familiar to you once you get use to it.

If you really want to have web faster, safer and easier, use Firefox with Flashblock plugin.
It's magic to see how incredibly fast the web can be without having to load all those annoying Flash ads...

I use Firefox 3.0.1.0 with Littlefox skin and plugin Adblock plus. I added some buttons like bookmarks that are not enabled by default.Been using it like that for years, never finding anything better.Fast, slick, reliable, good looking.

Don't worry, it's becoming more of a fact in recent years. Comparatively, Firefox is like cold, thick, smooth, creamy Irish creme going down your throat. IE is like hot beer.
Anyway Firefox is great. I use Web of Trust and NoScript plugins. These 2 babies have helped prevent me from downloading automatically dling malware from certain sites. Awesome stuff.

that's bad, because I like hot beer.

*Takes off glasses*
... My God.

It's called, Sake.

Sake hardly qualifies as 'beer'. Sake is made by multiple parallel fermentation, without malt.
You had me scared there for a second, anyway.

Can I help you paraphrase?
"Hi GoG. I would like to give some feedback regarding the usability of the website with regards to the tech support page (<insert link here>)..
1) At the "tech support query" page, there is no "Next" button or any other way to send the message once I have composed it. I would like to suggest putting a "Send" button there so as to make it easier for users to send their messages to tech support.
2) The ability to submit a DXDiag report to support would also be a very welcome feature on the support page.
I feel that with these 2 additions, GoG can provide better support for their customers, providing better usability and reliability at the same time. Without these, I feel hampered when I tried to submit a query to tech support."
Same points, much nicer tone and language! A little time to compose the message can do wonders.