Oracle of the last say ~20 years has turned into a coward of a company in that they do not really invent but instead "copy", purchase (to remove from market) and spend large amounts of money trying to discredit other good technology. When they do buy things, they generally move it into the realm of the Oracle sphere which means they over price everything, remove as much as possible from the open market and require you pay for services to try and configure and install it. They try to paywall everything possible to extract every penny possible. You do have to hand it to them in one way, they have created a cash machine, even if many of us think it should crumble. I am not against them making money from things the create or purchase, but I am against the unscrupulous ways in which they do it.
When I was running my consulting firm we had a large Fortune 500 client where we were brought in to modernize their supply chain and backend systems. It took us around a year and a half total and we touched almost every system in their business. That timeframe includes closing the deal, documentation etc. It was a very very large system overall, of which we provided the core components and helped other integration people along as well as some of their own staff (so not easy). Well about 6-7 months before we were hired to do that major project, the company had brought in Oracle Financials to replace their accounting and financial modeling, reporting & compliance tools. When we wrapped up and left, Oracle STILL hadn't deployed a complete and successful, working solution beyond some small components after 2 years of efforts. Yes, the database was installed, yea the software was mostly installed, but the client couldn't use it to run their business and there were talks of legal getting involved every day. All the while Oracle kept charging more and more in consulting fees and increasing license costs.
That is one instance of a pattern I have seen over 20+ years from Oracle. They are just not a good company, they work to trap clients in relatively one sided agreements with lofty promises but then fail to deliver in almost every case.
I do know quite a few engineers that work (or have worked) at Oracle and at least of the ones I know they are highly intelligent and very capable people (that generally are paid handsomely, e.g. golden handcuffs of sort). IMO Oracle's product problems are not because of a lack of talent or capability but one of the business intentionally complicating things (with bureaucracy and poor planning) to the point that no one can deliver on the promises made.