Yes spoiled meat will taste bad after it's been cooked.
But most times if meat has really spoiled you'll notice it way before you even cook the meat as it will have a very sour raunchy smell to the spoiled meat.
Spoiled meat can also be slimy in feeling and if it is then it's best to throw it out.
But sometimes meat may only be partially spoiled and you might not notice it until you cook it and then smell it while cooking the meat or you might not notice the bad meat until you bite into it and taste it.
If it does taste bad or smell bad then throw the meat out because you could get food poisoning.