What you've said is completely true, but I still can't detect any bad behavior here. He stopped supporting a company that was threatening (not unfairly) his company with his software. Why would he be obligated to justify that?
If you built your business next to mine, and I shared e.g. my water infrastructure with you for free or for a nominal fee, then one day your business got large enough to threaten my business, am I obligated to let you keep using my water, or should you have figured something else out long ago?
If you built your business next to mine, and I shared e.g. my water infrastructure with you for free or for a nominal fee, then one day your business got large enough to threaten my business, am I obligated to let you keep using my water, or should you have figured something else out long ago?