It is pretty clear that the delay is planned and intentionally.
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Avalon team is corrupted, untrustworth, scammy, selfish, and criminal.
It's hard to put your finger on intentions. What we know for sure is that the customer support has degraded massively from shipping the first units to batch 3 and the chips, and there has been no attempt to rectify the situation. This makes you wonder what the long term plan of that company is. It is unlikely that they will operate in the B2C space any further, and focus on B2B - otherwise they would try to fix their reputational damage at this stage.
They announced better tech - but given the state of affairs, it's likely not going to benefit the mining community as a whole (e.g. by offering competitively priced hardware or similar arrangements), but a chosen group of investors/entrepreneurs.
I think most mining hardware sales is going to be B2B not B2C anyhow... if you are not looking to go "big" in mining one will have to take your ball and go home at this point. But yes poor customer service and management is the problem here and likely they could careless at this point given the remarks Yifu made. Alternatively the DIY or chip only fabricators will also push the marketplace. Given Avalons failure I can't see many people wanting to risk it.