This is really not as complicated as folks try to make it.
Income brackets:
The TCJA changed the tax brackets and the income thresholds for brackets. For example, if you are now in the 12% tax bracket, before you would have been in the 15% tax bracket. If you are now in the 22% tax bracket, you would have been in the 25% tax bracket. If you are now in the 24% tax bracket, you would have been in either the 28% or 25% tax bracket, depending on your income.
Nothing but good here so far
The act nearly doubled the standard deduction and eliminated or limited many itemized deductions. The effect of the tax reform was that many people who used to itemize on Schedule A took the standard deduction instead.
This is a good way to try to simplify the tax code. Doubling the standard deduction was good in that it encouraged people to use this instead of itemizing; bad, if you are someone that itemized and used any kind of deductions and credits you could get. A different debate would be whether that is personally good longterm or not (if you are doing this you are more than likely making bad fiscal choices for your longterm financial stability.
Personal Exemptions
The new law suspended personal and dependent exemptions between 2018 and 2025. Though an exemption is not technically a deduction, it functions the same way by allowing you to reduce your taxable income by the amount of the exemption. In this case, say the exemption was $4,050 for yourself and for each dependent you claim. Now, it is zero. Keep in mind, though, that even though you can't claim a personal or dependent exemption, you may be eligible for other tax benefits.
Same point here as above. The question is whether or not the simplification offset the exemptions enough, etc.
Child Tax Credit
The TCJA doubled the child tax credit(CTC) from $1,000 to $2,000 for those who qualify, including parents with higher incomes than in the past. That limit was increased again for the 2021 tax year to $3,000 for children ages six through 17 and $3,600 for children under the age of five. These reverted back to the original amount of $2,000 for 2022 and 2023. Income thresholds are $200,000 for single parents and $400,000 for those married filing jointly, whereafter the credit is reduced.
Remember, this is a tax credit so this comes directly off the total taxes you owe. In addition, a new $500 tax credit is available for dependents aged 17 and older.
Obviously, a good thing for middle to lower income classes.
Higher Standard Deduction
The TCJA raised the standard deduction for taxpayers. Single filers can claim a standard deduction of $12,950 in 2022 and $13,850 in 2023. For married couples filing jointly, the deduction is $25,900 in 2022 and $27,700 in 2023.
Regardless of your age, you may discover that the new standard deduction is larger than the combined total of your itemized deductions, even if you deduct mortgage interest.
Nothing not to like here.