Perhaps the reason why your MIL and DF are not supportive is the the fact they are now retired.
I have been in the profession for many years. Twenty years ago I loved my job and was happy with pay and conditions. Even five ago the situation was still tolerable, The last three years in particular have been absolutely hellish. Behaviour is shocking, bordering on criminal in some cases, and workload is immense.
As a secondary teacher I am expected, on my own, in 60 minutes, with 33 kids to: stretch the most able, support children who are illiterate and cannot read beyond cvc words, support EAL children with no English rather than yes and no, support children with ASD, manage behaviour issues which in the past would have gotten them excluded (no exclusions allowed now), engage everyone with innovative learning and teaching methods, give praise and feedback, and finally, teach the curriculum!
Teachers deserve more. The rallying call is for pay, but tbh the conditions and workload also need a radical rethink. Many of my colleagues are actively looking for ways out. We already have vacancies we cannot fill. Increased pay might just help to encourage more into the job. I genuinely fear for the future if we can't fix this.