So I just redid baseboard I did years ago, some lessons were learned. Lesson 1: Never try to do baseboards when you have a 1 month old baby. 2: buy this mitre angle tool and thank me later. https://www.amazon.ca/Starrett-505P-7-Miter-Saw-Protractor/dp/B003CJSQ4S. It’s now my favourite tool.
For future corners, I suggest getting this:
Also, from the look of your first pic, the most unsightly part is the door jamb. You should sand and fill with wood filler and sand again.
Then, as everyone has said, caulk and paint
I used this to help with my stair skirt, helped a ton
Starrett Miter Saw Protractor, Prosite 505P-7, Angle Finder Gauge Cutting Guide Tool with Laser Scales for Carpenters, Plumbers, Building Trades, DYI Home Improvement, 7” Narrow Plastic https://smile.amazon.com/dp/B003CJSQ4S/ref=cm_sw_r_cp_api_glt_i_W3Z335QCNPN4NNGMM2HG?_encoding=UTF8&psc=1
Buy one of these things my dude.
Starrett Miter Saw Protractor, Prosite 505P-7, Angle Finder Gauge Cutting Guide Tool with Laser Scales for Carpenters, Plumbers, Building Trades, DYI Home Improvement, 7” Narrow Plastic https://www.amazon.com/dp/B003CJSQ4S/ref=cm_sw_r_cp_api_glt_fabc_D018MECZDCV5TK0EQNQR
One of these will save you a lot of heartache
First, 1/4 round isn't the same height as depth. Before cutting your miter make sure it's in the "up" position it will be on the wall. Second, you will need an angle finder to cut the proper angle at the sections in the center of the room. I find this miter angle finder to be very helpful for doing cuts like that.
First, draw the heights on the walls, measure up from the nosings, connect the lines with a level or chalk line and once you do that take a bevel gauge, transfer it to paper and use a protractor and then look up a table of angles online if you dont know how to divide that protractor angle into a useful degree
Or just buy one of these because it does all of that in one step in seconds. I've used one for 20y and its indispensable imo...lives in my tool belt
As others have said, buy yourself a miter angle finder.
This is the one I bought prior to redoing all of the baseboard and crown molding in my house. It has never let me down, perfect miters every time, regardless how wonky a corner may be.
At $25, it’s a no-brainer versus the amount of time and money spent re-working or re-cutting pieces.
Starrett ProSite Miter Saw Protractor https://www.amazon.com/dp/B003CJSQ4S/ref=cm_sw_r_cp_api_glc_fabc_Tl2.FbH6SE10W
Came here to say this is what I use in every home I’ve ever worked in and for how cheap it is it’s saved me 1000s of hours trying to figure out weird angles or even angle that have 2 degree differences.
Starrett ProSite Miter Saw Protractor https://www.amazon.com/dp/B003CJSQ4S/ref=cm_sw_r_cp_api_glc_fabc_2N.7FbW07EFWS?_encoding=UTF8&psc=1
It looks like you may have a compound miter saw with the angle also set at more or less than 0 or you're not holding the board flat against the fence of the saw.
The suggestions here to practice and practice more are not at all wrong.
Also, a protractor like this is indispensible in calculating all angles for baseboard on inside and outside corners. All the corners in my house are off at least 1-2 degrees from 90.
EDIT: Fixed link
I assume I'll want some kind of table saw. I don't have one but I was gonna have a friend of mine help me with the cutting.
Something like this about right?
https://www.amazon.com/dp/B003CJSQ4S/ref=cm_sw_r_cp_awdb_t1_Ub--CbBDZ5612
There may be cheaper options too, but this is the standard.
[edit] Here's one for $12: https://www.amazon.com/Protractor-Precision-Measuring-Carpentry-Baseboard/dp/B08333SFM1/ref=psdc\_553274\_t2\_B003CJSQ4S
These
https://www.amazon.com/Starrett-505P-7-Miter-Saw-Protractor/dp/B003CJSQ4S/
Not an endorsement, just the first Google result.
Get yourself on of these. Starrett Miter Saw Protractor,... https://www.amazon.com/dp/B003CJSQ4S?ref=ppx_pop_mob_ap_share
Measure the angle, divide by two, set saw to that angle and cut!
Get yourself a miter protractor like the Starrett 505P-7 https://www.amazon.ca/dp/B003CJSQ4S
Use this... https://www.amazon.com/dp/B003CJSQ4S
And watch this... https://www.youtube.com/watch?v=dRq6cV0Vf0g&t=194s
Do you have a compound miter saw? If yes, dont give up.
If no, are you willing to buy one? If yes, dont give up.
Also, you need one of these. https://www.amazon.com/dp/B003CJSQ4S
Order one of these, its 25 dollars and its absolutely priceless because you will never have to do what you just did again and you will never make a mistake
Also, you need to know the spring angle of the crown
Once you know that you use this table and apply the proper angles
Starrett ProSite Miter Saw Protractor https://www.amazon.com/dp/B003CJSQ4S/ref=cm_sw_r_cp_api_i_3yawFbHKS41RX
This thing is so handy for doing trim work.